US Patent No: 7,455,765

Number of patents in Portfolio can not be more than 2000

Wastewater treatment system and method

ALSO PUBLISHED AS: 20070170112

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Abstract

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The invention is directed to a wastewater treatment system having an anoxic biological treatment zone, an aerobic biological treatment zone and a separator. The concentration of oxygen in streams within the system is strategically managed for improved removal of nutrient from the wastewater. A source of biodegradable carbon may be introduced to reduce the concentration of oxygen within the system. An effective treatment time under anoxic or aerobic conditions may further be varied.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EVOQUA WATER TECHNOLOGIES LLCALPHARETTA, GA303

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Elefritz, Robert A Ormond Beach, FL 3 31
Liu, Wenjun King of Prussia, PA 19 188

Cited Art Landscape

Patent Info (Count) # Cites Year
 
COULTER ELECTRONICS, LTD. (1)
4,718,270 Porosimeter and methods of assessing porosity 72 1985
 
Other [Check patent profile for assignment information] (22)
4,350,592 Cartridge filter 55 1980
4,642,182 Multiple-disc type filter with extensible support 79 1985
4,999,038 Filter unit 102 1989
H1045 Air bubble leak detection test device 49 1990
5,364,527 Apparatus and process for treating water 58 1992
5,316,671 Submersible aeration train and aeration apparatus for biological purification of sewage 57 1993
5,374,353 Aeration train and aeration apparatus for biological purification of wastewater 44 1993
5,584,786 Abdominal exercise device 48 1994
5,597,732 Composting apparatus 53 1995
6,048,454 Oil filter pack and assembly 80 1997
5,942,113 Solid-liquid separating filter medium for sewage, waste water, etc 60 1997
* 5,989,428 Controlling wastewater treatment by monitoring oxygen utilization rates 67 1997
6,303,026 Wastewater treatment tank with influent gates and pre-react zone with an outwardly flared lower portion 38 1999
6,444,124 System and method for improved treatment of wastewater 54 2000
6,423,214 Device for decanting supernatant 39 2001
* 6,562,237 Biological nutrient removal using the olaopa process 41 2002
6,758,972 Method and system for sustainable treatment of municipal and industrial waste water 46 2002
2004/0145,076 Scouring method 47 2004
2004/0168,979 Scouring method 39 2004
2004/0232,076 Scouring method 53 2004
2005/0032,982 Modified membranes 44 2004
2006/0273,038 Chemical cleaning for membranes 39 2006
 
TERUMO CARDIOVASCULAR SYSTEMS CORPORATION (1)
6,113,782 Potting of tubular bundles in housing 70 1998
 
Clarcor Engine Mobile Solutions, LLC (1)
6,048,455 Filter assembly with conformal cartridge support structure 63 1997
 
Voith Sulzer Paper Technology North America, Inc. (1)
5,968,357 Screen basket having a removable and replaceable cylindrical mesh liner 46 1998
 
TERUMO KABUSHIKI KAISHA (1)
5,552,047 Hollow filament blood processing apparatus 47 1995
 
MEMTEC AMERICA CORPORATION (1)
5,468,397 Gas backwash of pleated filters 57 1993
 
L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (2)
4,670,145 Multiple bundle fluid separation apparatus 81 1986
6,290,756 Hollow fiber membrane tubesheets of variable epoxy composition and hardness 54 1997
 
STUDIECENTRUM VOOR KERNENERGIE, SCK (1)
4,253,936 Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder 52 1980
 
Memtec Limited (5)
4,816,160 Cooling hollow fibre cross-flow separators 64 1986
4,793,932 Variable volume filter or concentrator 72 1986
4,935,143 Cleaning of filters 72 1988
4,921,610 Cleaning of hollow fibre filters 95 1988
5,918,264 Fiber monitoring system 60 1995
 
ATARA ENVIRONMENTAL, INC. (1)
2004/0035,770 Dynamically responsive aerobic to anoxic inter-zone flow control system for single vessel multi-zone bioreactor wastewater treatment plants 47 2002
 
Memtec Japan Limited (1)
5,353,630 Apparatus for testing membrane filter integrity 78 1993
 
NXSTAGE MEDICAL, INC. (1)
6,702,561 Devices for potting a filter for blood processing 73 2001
 
Hampton Roads Sanitation District (1)
4,867,883 High-rate biological waste water treatment process using activated sludge recycle 93 1988
 
SECURTIY STATE BANK OF PINE ISLAND (1)
5,361,625 Method and device for the measurement of barrier properties of films against gases 72 1993
 
TECHNOLOGIES AVANCEES & MEMBRANES INDUSTRIELLES (1)
6,780,466 Cross-flow filter membrane and method of manufacturing it 41 2002
 
COLEY PHARMACEUTICAL GROUP, INC. (1)
6,696,465 Sulfonamido substituted imidazopyridines 100 2002
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
6,524,733 Fuel cell system with humidity determination 63 2000
 
MITSUBISHI RAYON CO., LTD. (3)
5,480,553 Hollow fiber membrane module 107 1993
5,677,360 Hydrophilic polymer alloy, fiber and porous membrane comprising this polymer alloy, and methods for preparing them 49 1995
6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly 82 1999
 
KHUDENKO ENGINEERING, INC. (1)
5,846,424 Biological treatment of materials 64 1996
 
Kasasumi Laboratories, Inc. (1)
4,666,543 Hollow fiber device for removing waste material in the blood and a process of manufacture thereof 60 1984
 
VOST ENVIRONMENTAL TECHNOLOGIES, INC. (1)
7,018,530 Apparatus for biological treatment of waste waters 42 2004
 
NALCO COMPANY (1)
5,419,816 Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions 80 1993
 
CH2M HILL, INC. (1)
6,946,073 Method for treating wastewater in a membrane bioreactor to produce a low phosphorus effluent 54 2003
 
E. I. DU PONT DE NEMOURS AND COMPANY (5)
4,988,444 Prevention of biofouling of reverse osmosis membranes 52 1989
5,137,631 Multiple bundle permeator 77 1991
5,320,760 Method of determining filter pluggage by measuring pressures 62 1992
5,262,054 Process for opening reverse osmosis membranes 47 1992
5,470,469 Hollow fiber cartridge 109 1994
 
LYONNAISE DES EAUX-DUMEZ (1)
5,066,402 Method of changing operating modes in automatic water filtering apparatus using tubular membranes 109 1990
 
MILLIPORE S.A.S. (1)
5,556,591 Membrane sealing techniques using thermoplastic polymers 50 1994
 
ELECTRIC POWER RESEARCH INSTITUTE, INC. (1)
5,005,430 Automated membrane filter sampler 66 1990
 
SUMITOMO HEAVY INDUSTRIES, LTD. (2)
6,284,135 Membrane filter apparatus with gas discharge cleaning means 75 1998
6,402,955 Method for operating a membrane filter having a gas discharge cleaning means 62 2001
 
KABUSHIKI KAISHA MEIDENSHA (1)
4,824,563 Equipment for treating waste water 75 1986
 
IONICS, INCORPORATED (2)
5,066,375 Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack 123 1990
5,147,553 Selectively permeable barriers 84 1991
 
ROTEM INDUSTRIES LTD. (1)
5,575,963 Selective clogging of failed fibers 41 1994
 
BRENTWOOD INDUSTRIES, INC. (1)
6,869,534 Sludge digestion methods and apparatus 42 2003
 
HENKEL CHILE S.A. (HENKEL CHILE) (1)
6,727,305 Filler-containing polymer dispersion, method for its production and its use 51 2001
 
CHEMFAB CORPORATION (1)
5,075,065 Method for manufacturing of cast films at high productivity 60 1989
 
MILLIPORE CORPORATION (3)
5,079,272 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 82 1989
5,211,823 Process for purifying resins utilizing bipolar interface 97 1991
5,158,721 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 72 1991
 
Micron Separations, Inc. (1)
5,411,663 Alcohol-insoluble nylon microporous membranes 50 1993
 
MILLIPORE INVESTMENT HOLDINGS LIMITED (1)
4,632,745 Electrodeionization apparatus 167 1985
 
X-FLOW B.V. (1)
5,076,925 Process for preparing a microporous membrane and such a membrane 86 1990
 
KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY (1)
* 7,314,563 Membrane coupled activated sludge method and apparatus operating anoxic/anaerobic process alternately for removal of nitrogen and phosphorous 35 2005
 
Mobil Oil Corporation (3)
5,069,065 Method for measuring wettability of porous rock 80 1991
5,297,420 Apparatus and method for measuring relative permeability and capillary pressure of porous rock 86 1993
5,491,023 Film composition 66 1994
 
TEIJIN LIMITED (1)
4,388,189 Process for preparation of improved semipermeable composite membranes 83 1980
 
PALL CORPORATION (14)
4,340,479 Process for preparing hydrophilic polyamide membrane filter media and product 228 1980
4,431,545 Microporous filter system and process 98 1982
4,609,465 Filter cartridge with a connector seal 136 1984
4,702,840 Charge modified polyamide membrane 89 1986
4,707,266 Polyamide membrane with controlled surface properties 81 1986
4,774,132 Polyvinylidene difluoride structure 54 1986
4,839,048 Container for pressurized fluid 54 1986
5,417,101 Method and apparatus for testing the integrity of filter elements 86 1992
6,045,899 Highly assymetric, hydrophilic, microfiltration membranes having large pore diameters 126 1996
6,083,393 Hydrophilic membrane 73 1997
6,039,872 Hydrophilic membrane 72 1998
6,770,202 Porous membrane 63 2002
6,811,696 Hydrophobic membrane materials for filter venting applications 47 2002
6,884,375 Hydrophobic membrane materials for filter venting applications 56 2004
 
PTI TECHNOLOGIES, INC. (1)
4,812,235 Filter element assembly replaceable mesh pack 73 1983
 
CHAPIN MANUFACTURING, INC. (1)
6,440,303 Fluid filter 65 2001
 
CORNING INCORPORATED (2)
4,781,831 Cross-flow filtration device with filtrate flow conduits and method of forming same 85 1987
5,275,766 Method for making semi-permeable polymer membranes 54 1992
 
Battelle Energy Alliance, LLC (1)
6,036,030 Method for producing a selectively permeable separation module 41 1997
 
ELF ATOCHEM S.A. (1)
5,747,605 Mixtures of polymers including a halogen-containing polymer and compatibilized with a grafted aliphatic polyester 49 1995
 
TOYO BOSEKI KABUSHIKI KAISHA (1)
4,451,369 Fluid separation apparatus 114 1981
 
HANYU SANYO ELECTRONIC CO., LTD. (1)
2002/0070,157 Filter device 40 2001
 
FUJIFILM MANUFACTURING EUROPE B.V. (1)
6,890,645 Photocatalytic sheet or film and its manufacturing process 49 2001
 
FILTERTEK INC. (1)
4,414,172 Process and apparatus for sealing a plurality of filter elements 72 1982
 
OSMONICS, INC. (1)
4,846,970 Cross-flow filtration membrane test unit 88 1987
 
EVOQUA WATER TECHNOLOGIES LLC (30)
5,895,570 Modular filtering system 57 1996
6,159,373 Cleaning of hollow fibre membranes 60 1997
6,077,435 Filtration monitoring and control system 92 1998
6,156,200 Gas-scrubbed hollow fiber membrane module 107 1998
6,254,773 Microporous membrane filtration assembly 68 1999
6,555,005 Scouring method 81 1999
6,202,475 Predicting logarithmic reduction values 60 1999
D478913 Manifold header 50 2000
D462699 Manifold header cap 57 2000
6,524,481 Apparatus and method for cleaning membrane filtration modules 76 2001
6,969,465 Scouring method 50 2002
6,783,008 Hollow fibre restraining system 49 2002
6,955,762 Method of cleaning membranes 38 2002
6,641,733 Apparatus and method for cleaning membrane filtration modules 62 2002
6,872,305 Membrane filtration system 46 2003
6,821,420 Apparatus and method for cleaning membrane filtration modules 48 2003
6,884,350 Modified membranes 51 2003
7,083,733 Water treatment system and method 54 2003
7,264,716 Membrane filtration manifold system 39 2003
2007/0007,214 Mixing chamber 42 2003
7,226,541 Membrane polymer compositions 44 2003
7,018,533 High solids module 40 2004
6,841,070 Apparatus and method for cleaning membrane filtration modules 43 2004
6,962,258 Hollow fiber restraining system 37 2004
7,300,022 Modified membranes 46 2004
7,247,238 Poly(ethylene chlorotrifluoroethylene) membranes 47 2004
2007/0075,021 Module cleaning method 37 2004
7,160,463 Methods of minimizing the effect of integrity loss in hollow fibre membrane modules 40 2004
2007/0227,973 Reduction of Backwash liquid Waste 37 2005
2006/0131,234 Scouring method 39 2005
 
THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIVERSITY OF ARIZONA (1)
5,531,900 Modification of polyvinylidene fluoride membrane and method of filtering 75 1994
 
Hydrotreat, Inc. (1)
6,805,806 Method and apparatus for treatment of wastewater employing membrane bioreactors 57 2002
 
DELAWARE PMC-SIERRA, INC. (1)
5,479,590 Anti-aliasing method for polynomial curves using integer arithmetics 63 1994
 
MEDIVATORS INC. (3)
5,543,002 Method of manufacture of hollow fiber filter cartridge with porous ring 65 1994
5,554,283 Hollow fiber filter having a porous collar/ring seal 82 1995
5,531,848 Method of manufacturing of hollow fiber cartridge with porous ring 70 1995
 
Rhone-Poulenc Recherches (1)
4,810,384 Hydrophilic PVDF semipermeable membrane 81 1987
 
SEITZ-FILTER-WERKE GMBH UND CO. (3)
5,034,125 Membrane filtering device for micro and ultra filtration of fluids by the crossflow method 62 1990
5,169,528 Filter element 57 1990
5,290,457 Filter element with regenerable bulk material filling and method for making same 64 1992
 
PALL FILTRATION AND SEPARATIONS GROUP INC. (1)
6,146,747 Highly porous polyvinylidene difluoride membranes 81 1998
 
SIEMENS WATER TECHNOLOGIES CORP. (7)
4,919,815 Two-stage anaerobic/aerobic treatment process 91 1989
5,094,750 Hollow fibre filter cartridge and header 59 1989
5,194,149 Filter cartridge manifold 64 1991
5,192,442 Multiple zone batch treatment process 81 1991
5,405,528 Modular microporous filter assemblies 82 1992
2004/0217,053 Method of cleaning membrane modules 50 2004
2007/0056,905 Continuous pressure decay test 38 2005
 
3M INNOVATIVE PROPERTIES COMPANY (6)
6,096,213 Puncture-resistant polyolefin membranes 75 1998
6,277,512 Polymer electrolyte membranes from mixed dispersions 96 1999
6,423,784 Acid functional fluoropolymer membranes and method of manufacture 67 1999
6,790,912 Extrudable fluoropolymer blends 53 2001
6,861,466 Fluoropolymer dispersion containing no or little low molecular weight fluorinated surfactant 86 2004
7,041,728 Aqueous dispersions of polytetrafluoroethylene having a low amount of fluorinated surfactant 74 2004
 
ALBERT EINSTEIN COLLEGE OF MEDICINE OF YESHIVA UNIVERSITY (1)
5,358,732 Method and system for removing impurities from aliments 41 1993
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
5,104,546 Pyrogens separations by ceramic ultrafiltration 80 1990
 
CIENA CORPORATION (1)
7,706,687 Automatic provisioning of network services based on user application requirements 14 2001
 
NEPHROS, INC. (2)
6,315,895 Dual-stage hemodiafiltration cartridge 60 1999
6,635,179 Sterile fluid filtration cartridge and method for using same 57 1999
 
INEOS BIO LIMITED (1)
6,368,819 Microbial process for the preparation of acetic acid as well as solvent for its extraction from the fermentation broth 75 2001
 
EBARA CORPORATION (3)
4,775,471 Hollow fiber filter device 69 1986
4,876,006 Hollow fiber filter device 121 1988
5,744,037 Method of treating foul water 50 1996
 
DRM, DR. MUELLER AG (1)
4,511,471 Filter apparatus for continuously thickening suspensions 63 1983
 
Kinetico Incorporated (1)
4,650,586 Fluid treatment system 72 1985
 
PPG Industries, Inc. (1)
4,610,789 Filtration cartridge and reactor 47 1985
 
EMD MILLIPORE CORPORATION (1)
7,005,100 Method for manufacturing a potted bundle of hollow fibers 38 2000
 
Exxon Research and Engineering Company (1)
5,396,019 Fluorinated polyolefin membranes for aromatics/saturates separation 61 1993
 
Clack Corporation (1)
5,389,260 Brine seal for tubular filter 86 1993
 
PALL SEITZSCHENK FILTERSYSTEMS GMBH (1)
6,974,554 Potting method 47 2003
 
NATIONAL RESEARCH COUNCIL OF CANADA (1)
6,066,401 Wide-band two-layer antireflection coating for optical surfaces 46 1998
 
Baxter Travenol Laboratories, Inc. (1)
4,389,363 Method of potting microporous hollow fiber bundles 60 1980
 
ACTIVE PROTECTIVE TECHNOLOGIES, INC. (1)
2005/0067,816 Method and apparatus for body impact protection 6 2004
 
Aqua-Aerobic Systems, Inc. (1)
5,951,878 Method and apparatus for cleaning filter material in a filter apparatus utilizing a suction generating nozzle 58 1998
 
SEVERN TRENT SERVICES-WATER PURIFICATION SOLUTIONS, INC. (1)
* 7,022,233 Biologically active reactor system and method for treating wastewater 39 2004
 
AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH (2)
4,407,975 Polymeric membrane having maleic anhydride residues 50 1982
4,491,522 Anaerobic digestion process for organic wastes 67 1983
 
BASF AKTIENGESELLSCHAFT (2)
5,094,867 Removal of heavy metal ions from wine and wine-like beverages 53 1991
6,264,839 Phosphonomethylated polyvinylamines and preparation and use thereof 53 1993
 
CANANDAIGUA WINE COMPANY, INC. (1)
4,834,998 Ultrafiltration of red wines 42 1986
 
ONDEO DEGREMONT, INC. (1)
* 6,808,629 Method for effluent purification 36 2003
 
Veolia Water Solutions & Technologies Support (1)
7,172,701 Water treatment method using an inorganic powder reagent with high specific surface area including a step of recycling said reagent 54 2003
 
Kabushiki Kaisha Ito Tekkousho (1)
4,647,377 Filter apparatus 91 1984
 
ZAO STC "VALDIPOR" (1)
5,988,400 Pourous fluorocarbon membrane, method for producing thereof and cartridge filter based on said membrane 57 1997
 
Filterwerk Mann & Hummel GmbH (1)
4,688,511 Dirt accumulation indicator for air intake filters 87 1985
 
FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V. (1)
5,151,193 Polymer membranes on the basis of polyvinylidene fluoride, a process for the production thereof and their use 68 1990
 
FORSCHUNGSZENTRUM KARLSRUHE GMBH (1)
4,797,211 Cross flow microfilter 109 1986
 
AKZO NOBEL N.V. (1)
6,214,232 Membrane module with layered hollow-fiber membranes 45 1999
 
CUMMINS FILTRATION INC. (2)
2004/0094,459 LIQUID FILTER WITH SEPARATE AND CALIBRATED VAPOR RELEASE 1 2003
2004/0094,459 LIQUID FILTER WITH SEPARATE AND CALIBRATED VAPOR RELEASE 1 2003
 
YAMAHA HATSUDOKI KABUSHIKI KAISHA (1)
4,763,612 Intake system for internal combustion engine 66 1987
 
DONALDSON COMPANY, INC. (1)
4,779,448 Photoelectric bubble detector apparatus and method 66 1986
 
HENKEL KOMMANDITGESELLSCHAFT AUF AKTIEN (HENKEL KGAA) (1)
4,650,596 Pour point depressants for paraffin solutions 50 1985
 
KABUSHIKI KAISHA TOSHIBA (1)
4,756,875 Apparatus for filtering water containing radioactive substances in nuclear power plants 74 1986
 
SNECMA (1)
5,477,731 Method and apparatus for detecting a fouled fluid filter 73 1994
 
ECO-TEC LIMITED (1)
4,673,507 Fluid treatment process and apparatus 71 1985
 
CMS TECHNOLOGIES HOLDINGS, INC. (1)
6,221,247 Dioxole coated membrane module for ultrafiltration or microfiltration of aqueous suspensions 61 1999
 
AKZO N.V. (4)
4,359,359 Production of polyurethane embedding materials and use thereof 64 1981
4,933,084 Dialysis membrane of cellulose in the shape of a hollow fiber, and process for the production thereof 45 1985
4,744,240 Method for determining the bubble point or the largest pore of membranes or of filter materials 77 1987
5,066,401 Flat or capillary membrane based on a homogeneous mixture of polyvinylidene fluoride and a second polymer which can be rendered hydrophilic by chemical reaction 79 1990
 
SMARTFLOW TECHNOLOGIES, INC. (1)
6,017,451 Spider fitting for multi-module filter system, and motive cart assembly comprising same 43 1997
 
GAMBRO DIALYSATOREN GMBH (1)
4,689,191 Method for setting the ends of hollow fiber bundles 61 1985
 
WATER RECOVERY, INC. (1)
5,364,529 Wastewater treatment system 61 1992
 
Sartorius GmbH (1)
4,969,997 Fluid-impermeable areas on porous membrane filters and their application 47 1989
 
OTV SA (1)
5,607,593 Installation for making water potable with submerged filtering membranes 126 1994
 
PERMEA, INC. (2)
4,369,605 Methods for preparing tube sheets for permeators having hollow fiber membranes 55 1980
4,687,578 Fluid separation membranes 60 1985
 
ORGANO CORPORATION (1)
5,525,220 Filtration equipment 49 1994
 
ECOTECHNIEK B.V. (1)
* 5,290,451 Method and apparatus for processing manure 57 1992
 
STORK FRIESLAND B.V. (1)
6,576,136 Method and apparatus for removing floating substances and salts from a liquid by means of a membrane filtration 38 2001
 
ZENON TECHNOLOGY PARTNESHIP (1)
6,863,817 Membrane bioreactor, process and aerator 54 2002
 
Nishihara Environmental Sanitation Research Corporation Limited (1)
5,098,567 Waste water treating process 58 1990
 
ORGANO CORPORATION 5-16, HONGO 5-CHOME, BUNKYO-KU (1)
5,484,528 Filtration equipment for hollow fiber module 59 1994
 
ZENON ENVIRONMENTAL INC. (20)
5,227,063 Tubular membrane module 63 1990
5,104,535 Frameless array of hollow fiber membranes and module containing a stack of arrays 74 1990
5,182,019 Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges 78 1992
5,248,424 Frameless array of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 161 1992
5,403,479 In situ cleaning system for fouled membranes 104 1993
5,501,798 Microfiltration enhanced reverse osmosis for water treatment 81 1994
5,670,053 Purification of gases from water using reverse osmosis 100 1995
5,766,479 Production of high purity water using reverse osmosis 105 1995
5,958,243 Apparatus and method for membrane filtration with enhanced net flux 71 1997
5,914,039 Filtration membrane with calcined .alpha.-alumina particles therein 86 1997
5,944,997 System for maintaining a clean skein of hollow fibers while filtering suspended solids 124 1998
5,997,745 Method for producing high purity water using triple pass reverse osmosis (TPRO) 67 1998
6,045,698 Method for cleaning a filtration installation of the type with immersed membranes 80 1998
6,024,872 Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom 78 1999
6,361,695 Shipboard wastewater treatment system 73 2000
6,485,645 Biological process for removing phosphorus involving a membrane filter 66 2002
6,645,374 Membrane module for gas transfer and membrane supported biofilm process 69 2003
6,964,741 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes 42 2003
2005/0115,899 Membrane bioreactor having single header membrane module 42 2004
2005/0194,315 Membrane batch filtration process 39 2005
 
ZENON TECHNOLOGY PARTNERSHIP (30)
5,639,373 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 154 1995
5,783,083 Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces 142 1996
5,910,250 Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers 110 1997
6,120,688 Portable reverse osmosis unit for producing drinking water 55 1998
6,042,677 Potted header for hollow fiber membranes and method for making it 93 1999
RE37549 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 82 1999
6,354,444 Hollow fiber membrane and braided tubular support therefor 93 1999
6,214,231 System for operation of multiple membrane filtration assemblies 79 1999
6,193,890 System for maintaining a clean skein of hollow fibers while filtering suspended solids 104 1999
6,303,035 Immersed membrane filtration process 64 1999
6,375,848 Water filtration using immersed membranes 72 1999
6,245,239 Cyclic aeration system for submerged membrane modules 88 2000
6,325,928 Immersed membrane element and module 82 2000
6,294,039 Potted header for hollow fiber membranes 77 2000
6,893,568 Immersed membrane filtration system and overflow process 55 2000
6,406,629 Biological process for removing phosphorous involving a membrane filter 69 2000
6,550,747 Cyclic aeration system for submerged membrane modules 68 2001
6,656,356 Aerated immersed membrane system 68 2001
6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes 72 2001
6,899,812 Water filtration using immersed membranes 44 2002
6,708,957 Moving aerator for immersed membranes 51 2002
6,685,832 Method of potting hollow fiber membranes 66 2002
6,863,823 Inverted air box aerator and aeration method for immersed membrane 48 2002
6,682,652 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fiber membranes 58 2002
6,814,861 Ultrafiltration and microfiltration module and system 42 2002
6,706,189 Cyclic aeration system for submerged membrane modules 68 2003
2003/0146,153 Chemical cleaning backwash for normally immersed membranes 39 2003
2004/0007,525 Maintenance cleaning for membranes 39 2003
6,881,343 Cyclic aeration system for submerged membrane modules 44 2003
7,052,610 Immersed membrane filtration system and overflow process 41 2005
 
WATER PURE INC. (1)
4,784,771 Method and apparatus for purifying fluids 84 1987
 
Dragerwerk Aktiengesellschaft (1)
4,840,227 Process for producing a hollow fiber mass transfer module and module produced by this process 54 1988
 
KURARAY CO., LTD. (1)
4,547,289 Filtration apparatus using hollow fiber membrane 88 1984
 
BAYER AKTIENGESELLSCHAFT (2)
4,968,430 Composite membranes, processes for their preparation and their use 73 1989
5,490,939 Process for reconcentrating overspray from one-component coating compositions 52 1995
 
I. KRUGER INC. (1)
7,147,778 Method and system for nitrifying and denitrifying wastewater 54 2006
 
ILLINOIS TOOL WORKS INC. (1)
5,688,460 Process for making hermetically sealed filter units 62 1996
 
ASAHI KASEI KABUSHIKI KAISHA (3)
6,299,773 Porous polyvinylidene fluoride resin film and process for producing the same 58 1999
6,322,703 Method for purifying aqueous suspension 50 2000
7,160,455 Hollow fiber membrane module 48 2002
 
Stay Fresh, Inc. (1)
4,476,112 Food preservative composition 75 1983
 
PBI-DANSENSOR A/S (1)
5,138,870 Apparatus for measuring water vapor permeability through sheet materials 68 1991
 
KUBOTA CORPORATION (3)
5,192,456 Apparatus for treating activated sludge and method of cleaning it 117 1992
5,451,317 Solid-liquid separator 69 1994
5,647,988 Method of back-washing submerged-type ceramic membrane separation apparatus 83 1994
 
AQUASOURCE (1)
5,393,433 Method using separation membranes to treat a fluid containing matter in suspension and in solution 50 1993
 
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA (3)
4,623,670 Porous fluorine resin membrane and process for preparing the same 63 1985
4,702,836 Porous fluorine resin membrane and process for preparing the same 64 1986
6,495,041 Method for purifying aqueous suspension 50 2001
 
Syrinx Research Pty. Ltd. (1)
4,749,487 High flux membrane 48 1985
 
W. L. Gore & Associates, Inc. (1)
5,843,069 Implantable containment apparatus for a therapeutical device and method for loading and reloading the device therein 177 1997
 
OVIVO LUXEMBOURG S.A.R.L. (2)
* 6,743,362 Sewage treatment process 47 2002
* 6,712,970 Sewage treatment process with phosphorus removal 54 2002
 
NITTO DENKO CORPORATION (2)
6,432,310 Methods of running and washing spiral wound membrane module 51 2000
2003/0127,388 Treatment system having spiral membrane element and method for operating the treatment system 39 2002
 
INVENSYS APV A/S (1)
5,906,739 Membrane filtration assembly 44 1996
 
U.S. FILTER/IONPURE, INC. (1)
4,687,561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions 116 1985
 
ADVANCED CARDIOVASCULAR SYSTEMS, INC. (1)
6,994,867 Biocompatible carrier containing L-arginine 55 2002
 
JGC Corporation (1)
4,540,490 Apparatus for filtration of a suspension 89 1983
 
SPECIALTY MATERIALS INC. (2)
4,384,474 Method and apparatus for testing and using membrane filters in an on site of use housing 79 1981
4,888,115 Cross-flow filtration 72 1983
 
MEMBRANA GMBH (2)
4,708,799 Hollow fiber membrane for plasma separation 66 1985
4,968,733 Process for producing microporous powders and membranes 101 1989
 
Union Camp Corporation (1)
5,888,401 Method and apparatus for reducing membrane fouling 62 1996
 
ENVIROGEN TECHNOLOGIES, INC. (1)
6,627,082 System and method for withdrawing permeate through a filter and for cleaning the filter in situ 44 2001
 
MOCON, INC (1)
4,660,411 Apparatus for measuring transmission of volatile substances through films 69 1985
 
THE DOW CHEMICAL COMPANY (6)
4,656,865 System for analyzing permeation of a gas or vapor through a film or membrane 82 1985
4,797,187 Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups 71 1987
4,904,426 Process for the production of fibers from poly(etheretherketone)-type polymers 56 1988
4,963,304 Process for preparing microporous membranes 63 1988
5,015,275 Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same 54 1989
5,221,478 Chromatographic separation using ion-exchange resins 59 1992
 
ROCHEM ULTRAFILTRATIONS SYSTEME GESELLSCHAFT FUR ABWASSERREINIGUNG MBH (1)
6,126,819 Apparatus for the treatment of liquids contaminated by foreign substances 50 1998
 
MEMCOR, INC., A CORP. OF DE (1)
4,614,109 Method and device for testing the permeability of membrane filters 84 1985
 
D.W. WALKER & ASSOCIATES (1)
5,198,116 Method and apparatus for measuring the fouling potential of membrane system feeds 66 1992
 
ASAHI GLASS COMPANY, LIMITED (1)
4,385,150 Organic solution of fluorinated copolymer having carboxylic acid groups 64 1981
 
MUELLER, ERICH, GEISMAYERSTR. 7, A-5020 SALZBURG, AUSTRIA (1)
5,059,317 Transportable apparatus for producing drinking water 79 1989
 
USFILTER CORPORATION (1)
4,636,296 Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions 112 1985
 
Ecodyne Corporation (1)
4,414,113 Liquid purification using reverse osmosis hollow fibers 82 1982
 
CELGARD LLC (2)
5,043,113 Process for formation of halogenated polymeric microporous membranes having improved strength properties 48 1990
6,149,817 Shell-less hollow fiber membrane fluid contactor 43 1999
 
LOCTITE CORPORATION (1)
5,135,663 Method of treating (meth)acrylic monomer-containing wastewater 51 1991
 
LANXESS DEUTSCHLAND GMBH (1)
6,387,189 Surface-cleaning method 45 1999
 
KOCH MEMBRANE SYSTEMS, INC. (2)
6,074,718 Self supporting hollow fiber membrane and method of construction 54 1996
6,890,435 Hollow fiber microfiltration membranes and a method of making these membranes 64 2002
 
SCIMAT LIMITED (1)
5,198,162 Microporous films 60 1989
 
TORAY INDUSTRIES, INC. (2)
5,286,324 Polytetrafluoroethylene resin porous membrane, separator making use of the porous membrane and methods of producing the porous membrane and the separator 56 1992
6,468,430 Method for inhibiting growth of bacteria or sterilizing around separating membrane 52 2000
 
MARY C. MARTIS (1)
5,733,456 Environmental control for biological nutrient removal in water/wastewater treatment 91 1997
 
B.F. GOODRICH COMPANY, THE (1)
4,496,470 Cleaning composition 60 1982
 
THERMA-WAVE, INC. (1)
6,952,258 Wafer chuck with integrated reference sample 39 2004
 
UNITED PET GROUP, INC. (1)
5,401,401 Hang on tank canister filter 79 1993
 
EASTMAN KODAK COMPANY (1)
6,721,529 Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat 72 2001
 
DOW GLOBAL TECHNOLOGIES INC. (1)
6,337,018 Composite membrane and method for making the same 72 2000
 
Gie Anjou-Recherche (1)
5,271,830 Water treatment installation for a tangential filtration loop 54 1990
 
SIEMENS INDUSTRY, INC. (4)
5,401,405 Combined air/water backwash in a travelling bridge filter 55 1993
5,643,455 Concentration of solids in a suspension using hollow fibre membranes 111 1995
2006/0261,007 Methods of cleaning membrane modules 39 2004
2006/0000,775 Scouring method 39 2005
 
Japan Organo Co., Ltd. (3)
4,886,601 Column filter using bundles of long fibers 68 1989
5,209,852 Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module 102 1991
5,151,191 Filtration process using hollow fiber membrane module 84 1991
 
CYNARA COMPANY, THE (1)
5,192,478 Method of forming tubesheet for hollow fibers 60 1992
 
BDF IP HOLDINGS LTD. (1)
6,723,758 Graft polymeric membranes and ion-exchange membranes formed therefrom 51 2001
 
U.S. FILTER WASTEWATER GROUP, INC. (10)
4,931,186 Concentration of solids in a suspension 71 1986
4,767,539 Cleaning of hollow fiber filters utilized in lumenal gas flow 78 1987
4,876,012 Hollow fibre filter cartridge and header 64 1988
5,024,762 Concentration of solids in a suspension 68 1990
2002/0148,767 Membrane filtration manifold system 56 2001
2003/0178,365 Scouring method 56 2003
2003/0226,797 Fibre membrane arrangement 53 2003
2004/0084,369 Scouring method 47 2003
2004/0178,154 Scouring method 39 2004
7,223,340 Hollow fibre restraining system 39 2005
 
USF FILTRATION AND SEPARATIONS GROUP INC. (2)
4,629,563 Asymmetric membranes 262 1981
5,906,742 Microfiltration membranes having high pore density and mixed isotropic and anisotropic structure 89 1997
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
SIEMENS WATER TECHNOLOGIES LLC (1)
8,758,622 Simple gas scouring method and apparatus 0 2005
 
EVOQUA WATER TECHNOLOGIES LLC (28)
7,938,966 Backwash method 27 2003
8,268,176 Backwash 0 2004
8,808,540 Module cleaning method 0 2004
8,758,621 Process and apparatus for purifying impure water using microfiltration or ultrafiltration in combination with reverse osmosis 0 2005
8,790,515 Reduction of backwash liquid waste 0 2005
8,506,806 Methods and apparatus for removing solids from a membrane module 0 2005
8,377,305 Continuously variable aeration 0 2005
8,496,828 Cleaning in membrane filtration systems 0 2005
8,048,306 Scouring method 2 2005
8,858,796 Assembly for water filtration using a tube manifold to minimise backwash 0 2006
8,293,098 Infiltration/inflow control for membrane bioreactor 0 2007
8,182,687 Methods of minimising the effect of integrity loss in hollow fibre membrane modules 0 2008
8,318,028 Infiltration/inflow control for membrane bioreactor 0 2008
7,722,769 Method for treating wastewater 29 2008
8,622,222 Membrane cleaning with pulsed airlift pump 0 2008
7,718,057 Wastewater treatment system 27 2008
8,512,568 Method of cleaning membrane modules 0 2009
8,382,981 Frame system for membrane filtration modules 1 2009
8,652,331 Membrane system backwash energy efficiency 0 2009
8,956,464 Method of cleaning membranes 0 2010
8,287,743 Membrane cleaning with pulsed airlift pump 1 2010
8,518,256 Membrane module 1 2011
9,022,224 Fluid control manifold for membrane filtration system 0 2011
8,372,276 Membrane cleaning with pulsed airlift pump 0 2011
8,623,202 Infiltration/inflow control for membrane bioreactor 0 2012
9,023,206 Frame system for membrane filtration modules 0 2013
8,840,783 Water treatment membrane cleaning with pulsed airlift pump 0 2013
8,894,858 Method and assembly for water filtration using a tube manifold to minimize backwash 0 2014
 
In-Pipe Technology, Inc. (1)
8,828,229 Distributed facultative bacteria water treatment system with membrane biological reactor package plant augmentation 0 2011
* Cited By Examiner

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