US Patent No: 7,247,238

Number of patents in Portfolio can not be more than 2000

Poly(ethylene chlorotrifluoroethylene) membranes

ALSO PUBLISHED AS: 20050098494
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Abstract

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Porous polymeric membranes including Halar (poly (ethylene chlorotrifluoroethylene)) and related compounds and the methods of production thereof which avoid the use of toxic solvents. Preferred solvents, coating agents and pore forming agents are citric acid ethyl ester or glycerol triacetate. The membranes may be in the form of a hollow fiber or flat sheet, and may include other agents to modify the properties of the membrane, such as the hydrophilic/hydrophobic balance. Leachable agents may also be incorporated into the membranes.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EVOQUA WATER TECHNOLOGIES LLCALPHARETTA, GA283

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Muller, Heinz-Joachim Thornleigh, AU 26 538
Mullette, Daniel Westmead, AU 18 152

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ZENON ENVIRONMENTAL INC. (13)
5,227,063 Tubular membrane module 59 1990
5,104,535 Frameless array of hollow fiber membranes and module containing a stack of arrays 69 1990
5,182,019 Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges 73 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 155 1992
5,403,479 In situ cleaning system for fouled membranes 100 1993
5,958,243 Apparatus and method for membrane filtration with enhanced net flux 66 1997
5,910,250 Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers 105 1997
5,914,039 Filtration membrane with calcined .alpha.-alumina particles therein 79 1997
5,944,997 System for maintaining a clean skein of hollow fibers while filtering suspended solids 119 1998
6,045,698 Method for cleaning a filtration installation of the type with immersed membranes 76 1998
6,024,872 Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom 71 1999
6,214,231 System for operation of multiple membrane filtration assemblies 75 1999
6,645,374 Membrane module for gas transfer and membrane supported biofilm process 64 2003
 
ZENON TECHNOLOGY PARTNERSHIP (13)
5,639,373 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 149 1995
5,783,083 Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces 138 1996
6,042,677 Potted header for hollow fiber membranes and method for making it 89 1999
RE37549 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 78 1999
6,354,444 Hollow fiber membrane and braided tubular support therefor 82 1999
6,193,890 System for maintaining a clean skein of hollow fibers while filtering suspended solids 100 1999
6,375,848 Water filtration using immersed membranes 66 1999
6,245,239 Cyclic aeration system for submerged membrane modules 80 2000
6,325,928 Immersed membrane element and module 77 2000
6,294,039 Potted header for hollow fiber membranes 73 2000
6,893,568 Immersed membrane filtration system and overflow process 51 2000
6,550,747 Cyclic aeration system for submerged membrane modules 64 2001
6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes 68 2001
 
EVOQUA WATER TECHNOLOGIES LLC (11)
6,159,373 Cleaning of hollow fibre membranes 55 1997
6,077,435 Filtration monitoring and control system 88 1998
6,156,200 Gas-scrubbed hollow fiber membrane module 103 1998
6,254,773 Microporous membrane filtration assembly 61 1999
6,555,005 Scouring method 76 1999
6,202,475 Predicting logarithmic reduction values 56 1999
D478913 Manifold header 46 2000
D462699 Manifold header cap 53 2000
6,524,481 Apparatus and method for cleaning membrane filtration modules 72 2001
6,641,733 Apparatus and method for cleaning membrane filtration modules 57 2002
6,884,350 Modified membranes 47 2003
 
PALL CORPORATION (11)
4,340,479 Process for preparing hydrophilic polyamide membrane filter media and product 222 1980
4,431,545 Microporous filter system and process 94 1982
4,609,465 Filter cartridge with a connector seal 131 1984
4,702,840 Charge modified polyamide membrane 85 1986
5,417,101 Method and apparatus for testing the integrity of filter elements 80 1992
6,045,899 Highly assymetric, hydrophilic, microfiltration membranes having large pore diameters 120 1996
6,083,393 Hydrophilic membrane 62 1997
6,039,872 Hydrophilic membrane 65 1998
6,770,202 Porous membrane 58 2002
6,811,696 Hydrophobic membrane materials for filter venting applications 43 2002
6,884,375 Hydrophobic membrane materials for filter venting applications 50 2004
 
U.S. FILTER WASTEWATER GROUP, INC. (8)
4,931,186 Concentration of solids in a suspension 67 1986
4,767,539 Cleaning of hollow fiber filters utilized in lumenal gas flow 74 1987
4,876,012 Hollow fibre filter cartridge and header 60 1988
5,024,762 Concentration of solids in a suspension 64 1990
2002/0148,767 Membrane filtration manifold system 52 2001
2003/0178,365 Scouring method 52 2003
2003/0226,797 Fibre membrane arrangement 49 2003
2004/0084,369 Scouring method 43 2003
 
The Dow Chemical Company (6)
4,656,865 System for analyzing permeation of a gas or vapor through a film or membrane 78 1985
4,797,187 Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups 67 1987
4,904,426 Process for the production of fibers from poly(etheretherketone)-type polymers 52 1988
4,963,304 Process for preparing microporous membranes 58 1988
5,015,275 Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same 50 1989
5,221,478 Chromatographic separation using ion-exchange resins 55 1992
 
Memtec Limited (5)
4,816,160 Cooling hollow fibre cross-flow separators 60 1986
4,793,932 Variable volume filter or concentrator 68 1986
4,935,143 Cleaning of filters 68 1988
4,921,610 Cleaning of hollow fibre filters 91 1988
5,918,264 Fiber monitoring system 56 1995
 
3M INNOVATIVE PROPERTIES COMPANY (4)
6,096,213 Puncture-resistant polyolefin membranes 69 1998
6,277,512 Polymer electrolyte membranes from mixed dispersions 89 1999
6,423,784 Acid functional fluoropolymer membranes and method of manufacture 63 1999
6,790,912 Extrudable fluoropolymer blends 49 2001
 
SIEMENS WATER TECHNOLOGIES CORP. (4)
5,094,750 Hollow fibre filter cartridge and header 55 1989
5,194,149 Filter cartridge manifold 59 1991
5,405,528 Modular microporous filter assemblies 76 1992
2004/0217,053 Method of cleaning membrane modules 46 2004
 
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA (3)
4,623,670 Porous fluorine resin membrane and process for preparing the same 57 1985
4,702,836 Porous fluorine resin membrane and process for preparing the same 57 1986
6,495,041 Method for purifying aqueous suspension 46 2001
 
E. I. DU PONT DE NEMOURS AND COMPANY (3)
5,137,631 Multiple bundle permeator 72 1991
5,320,760 Method of determining filter pluggage by measuring pressures 58 1992
5,470,469 Hollow fiber cartridge 103 1994
 
Japan Organo Co., Ltd. (3)
4,886,601 Column filter using bundles of long fibers 64 1989
5,209,852 Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module 95 1991
5,151,191 Filtration process using hollow fiber membrane module 77 1991
 
KUBOTA CORPORATION (3)
5,192,456 Apparatus for treating activated sludge and method of cleaning it 112 1992
5,451,317 Solid-liquid separator 64 1994
5,647,988 Method of back-washing submerged-type ceramic membrane separation apparatus 78 1994
 
MEDIVATORS INC. (3)
5,543,002 Method of manufacture of hollow fiber filter cartridge with porous ring 60 1994
5,554,283 Hollow fiber filter having a porous collar/ring seal 78 1995
5,531,848 Method of manufacturing of hollow fiber cartridge with porous ring 66 1995
 
MILLIPORE CORPORATION (3)
5,079,272 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 78 1989
5,211,823 Process for purifying resins utilizing bipolar interface 90 1991
5,158,721 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 67 1991
 
TEIJIN LIMITED (3)
4,302,336 Semipermeable composite membrane 75 1979
4,353,802 Semipermeable composite membrane 62 1979
4,388,189 Process for preparation of improved semipermeable composite membranes 79 1980
 
AKZO N.V. (2)
4,744,240 Method for determining the bubble point or the largest pore of membranes or of filter materials 72 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 72 1990
 
ASAHI KASEI KABUSHIKI KAISHA (2)
6,299,773 Porous polyvinylidene fluoride resin film and process for producing the same 54 1999
6,322,703 Method for purifying aqueous suspension 46 2000
 
EBARA CORPORATION (2)
4,775,471 Hollow fiber filter device 65 1986
4,876,006 Hollow fiber filter device 117 1988
 
KOCH MEMBRANE SYSTEMS, INC. (2)
6,074,718 Self supporting hollow fiber membrane and method of construction 50 1996
6,890,435 Hollow fiber microfiltration membranes and a method of making these membranes 55 2002
 
MEMBRANA GMBH (2)
4,708,799 Hollow fiber membrane for plasma separation 62 1985
4,968,733 Process for producing microporous powders and membranes 94 1989
 
MILLIPORE INVESTMENT HOLDINGS LIMITED (2)
4,203,848 Processes of making a porous membrane material from polyvinylidene fluoride, and products 115 1977
4,632,745 Electrodeionization apparatus 156 1985
 
MITSUBISHI RAYON CO., LTD. (2)
5,480,553 Hollow fiber membrane module 103 1993
6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly 77 1999
 
Mobil Oil Corporation (2)
5,069,065 Method for measuring wettability of porous rock 75 1991
5,297,420 Apparatus and method for measuring relative permeability and capillary pressure of porous rock 79 1993
 
NEPHROS, INC. (2)
6,315,895 Dual-stage hemodiafiltration cartridge 54 1999
6,635,179 Sterile fluid filtration cartridge and method for using same 52 1999
 
PTI TECHNOLOGIES, INC. (2)
4,218,324 Filter element having removable filter media member 70 1979
4,812,235 Filter element assembly replaceable mesh pack 67 1983
 
SPECIALTY MATERIALS INC. (2)
4,384,474 Method and apparatus for testing and using membrane filters in an on site of use housing 75 1981
4,888,115 Cross-flow filtration 68 1983
 
USF FILTRATION AND SEPARATIONS GROUP INC. (2)
4,629,563 Asymmetric membranes 253 1981
5,906,742 Microfiltration membranes having high pore density and mixed isotropic and anisotropic structure 78 1997
 
ABC Group (1)
D396726 Combined air intake manifold and filter 47 1997
 
ADVANCED CARDIOVASCULAR SYSTEMS, INC. (1)
6,994,867 Biocompatible carrier containing L-arginine 49 2002
 
Akzona Incorporated (1)
4,247,498 Methods for making microporous products 225 1978
 
ASAHI GLASS COMPANY, LIMITED (1)
4,385,150 Organic solution of fluorinated copolymer having carboxylic acid groups 60 1981
 
BASF AKTIENGESELLSCHAFT (1)
6,264,839 Phosphonomethylated polyvinylamines and preparation and use thereof 47 1993
 
Baxter Travenol Laboratories, Inc. (1)
4,248,648 Method of repairing leaks in a hollow capillary fiber diffusion device 62 1979
 
CELGARD LLC (1)
5,043,113 Process for formation of halogenated polymeric microporous membranes having improved strength properties 44 1990
 
CHAPIN MANUFACTURING, INC. (1)
6,440,303 Fluid filter 61 2001
 
CHEMFAB CORPORATION (1)
5,075,065 Method for manufacturing of cast films at high productivity 56 1989
 
Clack Corporation (1)
5,389,260 Brine seal for tubular filter 80 1993
 
CMS TECHNOLOGIES HOLDINGS, INC. (1)
6,221,247 Dioxole coated membrane module for ultrafiltration or microfiltration of aqueous suspensions 56 1999
 
CORNING INCORPORATED (1)
5,275,766 Method for making semi-permeable polymer membranes 50 1992
 
COULTER ELECTRONICS, LTD. (1)
4,718,270 Porosimeter and methods of assessing porosity 68 1985
 
CUMMINS FILTRATION INC. (1)
2004/0094,459 LIQUID FILTER WITH SEPARATE AND CALIBRATED VAPOR RELEASE 2003
 
D.W. WALKER & ASSOCIATES (1)
5,198,116 Method and apparatus for measuring the fouling potential of membrane system feeds 61 1992
 
DELAWARE PMC-SIERRA, INC. (1)
5,479,590 Anti-aliasing method for polynomial curves using integer arithmetics 58 1994
 
Donaldson Company, Inc. (1)
4,779,448 Photoelectric bubble detector apparatus and method 62 1986
 
Dragerwerk Aktiengesellschaft (1)
4,840,227 Process for producing a hollow fiber mass transfer module and module produced by this process 50 1988
 
DRM, DR. MUELLER AG (1)
4,511,471 Filter apparatus for continuously thickening suspensions 59 1983
 
EASTMAN KODAK COMPANY (1)
6,721,529 Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat 68 2001
 
ECO-TEC LIMITED (1)
4,673,507 Fluid treatment process and apparatus 64 1985
 
Electric Power Research Institute, Inc. (1)
5,005,430 Automated membrane filter sampler 62 1990
 
Exxon Research and Engineering Company (1)
5,396,019 Fluorinated polyolefin membranes for aromatics/saturates separation 56 1993
 
FILTERWERK MANN & HUMMEL GMBH (1)
4,688,511 Dirt accumulation indicator for air intake filters 83 1985
 
FORSCHUNGSZENTRUM KARLSRUHE GMBH (1)
4,797,211 Cross flow microfilter 105 1986
 
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 64 1990
 
FUJIFILM MANUFACTURING EUROPE B.V. (1)
6,890,645 Photocatalytic sheet or film and its manufacturing process 45 2001
 
HENKEL CHILE S.A. (HENKEL CHILE) (1)
6,727,305 Filler-containing polymer dispersion, method for its production and its use 46 2001
 
Industrial Air, Inc. (1)
4,193,780 Air filter construction 70 1978
 
IONICS, INCORPORATED (1)
5,066,375 Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack 113 1990
 
JGC CORPORATION (1)
4,540,490 Apparatus for filtration of a suspension 85 1983
 
Kabushiki Kaisha Ito Tekkousho (1)
4,647,377 Filter apparatus 86 1984
 
KABUSHIKI KAISHA TOSHIBA (1)
4,756,875 Apparatus for filtering water containing radioactive substances in nuclear power plants 70 1986
 
KINETICO INCORPORATED (1)
4,650,586 Fluid treatment system 68 1985
 
KURARAY CO., LTD. (1)
4,547,289 Filtration apparatus using hollow fiber membrane 84 1984
 
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (1)
4,670,145 Multiple bundle fluid separation apparatus 77 1986
 
LOCTITE CORPORATION (1)
5,135,663 Method of treating (meth)acrylic monomer-containing wastewater 47 1991
 
LYONNAISE DES EAUX-DUMEZ (1)
5,066,402 Method of changing operating modes in automatic water filtering apparatus using tubular membranes 102 1990
 
Massey-Ferguson Inc. (1)
4,192,750 Stackable filter head unit 94 1978
 
MEMCOR, INC., A CORP. OF DE (1)
4,614,109 Method and device for testing the permeability of membrane filters 79 1985
 
Memtec Japan Limited (1)
5,353,630 Apparatus for testing membrane filter integrity 73 1993
 
Micron Separations, Inc. (1)
5,411,663 Alcohol-insoluble nylon microporous membranes 46 1993
 
MOCON, INC. (1)
4,660,411 Apparatus for measuring transmission of volatile substances through films 65 1985
 
NALCO COMPANY (1)
5,419,816 Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions 74 1993
 
ORGANO CORPORATION (1)
5,525,220 Filtration equipment 45 1994
 
OSMONICS, INC. (1)
4,846,970 Cross-flow filtration membrane test unit 82 1987
 
OTV SA (1)
5,607,593 Installation for making water potable with submerged filtering membranes 121 1994
 
PALL FILTRATION AND SEPARATIONS GROUP INC. (1)
6,146,747 Highly porous polyvinylidene difluoride membranes 74 1998
 
PALL SEITZSCHENK FILTERSYSTEMS GMBH (1)
6,974,554 Potting method 42 2003
 
PBI-DANSENSOR A/S (1)
5,138,870 Apparatus for measuring water vapor permeability through sheet materials 64 1991
 
Rhone-Poulenc Recherches (1)
4,810,384 Hydrophilic PVDF semipermeable membrane 77 1987
 
SCIMAT LIMITED (1)
5,198,162 Microporous films 56 1989
 
SECURTIY STATE BANK OF PINE ISLAND (1)
5,361,625 Method and device for the measurement of barrier properties of films against gases 68 1993
 
SIEMENS INDUSTRY, INC. (1)
5,643,455 Concentration of solids in a suspension using hollow fibre membranes 106 1995
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
5,104,546 Pyrogens separations by ceramic ultrafiltration 76 1990
 
SNECMA (1)
5,477,731 Method and apparatus for detecting a fouled fluid filter 69 1994
 
Standard Oil Company (Indiana) (1)
4,188,817 Method for detecting membrane leakage 62 1978
 
STUDIECENTRUM VOOR KERNENERGIE, SCK (1)
4,253,936 Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder 45 1980
 
SUMITOMO HEAVY INDUSTRIES, LTD. (1)
6,284,135 Membrane filter apparatus with gas discharge cleaning means 71 1998
 
TOYO BOSEKI KABUSHIKI KAISHA (1)
4,451,369 Fluid separation apparatus 108 1981
 
U.S. FILTER/IONPURE, INC. (1)
4,687,561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions 107 1985
 
UNITED PET GROUP, INC. (1)
5,401,401 Hang on tank canister filter 75 1993
 
UNITED STATES FILTER CORPORATION (1)
4,636,296 Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions 105 1985
 
UNIVERSITY OF ARIZONA (1)
5,531,900 Modification of polyvinylidene fluoride membrane and method of filtering 70 1994
 
WATER PURE INC. (1)
4,784,771 Method and apparatus for purifying fluids 80 1987
 
X-FLOW B.V. (1)
5,076,925 Process for preparing a microporous membrane and such a membrane 82 1990
 
YAMAHA HATSUDOKI KABUSHIKI KAISHA (1)
4,763,612 Intake system for internal combustion engine 62 1987
 
ZAO STC "VALDIPOR" (1)
5,988,400 Pourous fluorocarbon membrane, method for producing thereof and cartridge filter based on said membrane 53 1997
 
Other [Check patent profile for assignment information] (10)
4,230,583 Supported anisotropic reverse osmosis membranes based on synthetic polyamides and processes for their preparation 55 1978
4,642,182 Multiple-disc type filter with extensible support 75 1985
4,999,038 Filter unit 96 1989
H1045 Air bubble leak detection test device 48 1990
5,364,527 Apparatus and process for treating water 54 1992
D396046 Steer device for an outboard motor 45 1996
6,048,454 Oil filter pack and assembly 76 1997
5,942,113 Solid-liquid separating filter medium for sewage, waste water, etc 56 1997
D400890 Automotive manifold 51 1997
2004/0145,076 Scouring method 43 2004

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
EVOQUA WATER TECHNOLOGIES LLC (36)
7,938,966 Backwash method 22 2003
8,372,282 Mixing chamber 0 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
7,387,723 Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials 32 2005
8,524,794 Hydrophilic membranes 0 2005
7,931,463 Apparatus for potting membranes 21 2005
7,862,719 Square membrane manifold system 23 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
7,455,765 Wastewater treatment system and method 26 2006
7,591,950 Submerged cross-flow filtration 26 2006
8,858,796 Assembly for water filtration using a tube manifold to minimise backwash 0 2006
7,563,363 System for treating wastewater 23 2006
7,632,439 Poly(ethylene chlorotrifluoroethylene) membranes 28 2007
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 24 2008
8,622,222 Membrane cleaning with pulsed airlift pump 0 2008
7,718,065 Filtration method and apparatus 23 2008
7,718,057 Wastewater treatment system 23 2008
8,512,568 Method of cleaning membrane modules 0 2009
8,382,981 Frame system for membrane filtration modules 0 2009
8,652,331 Membrane system backwash energy efficiency 0 2009
8,057,574 Membrane post treatment 0 2009
8,287,743 Membrane cleaning with pulsed airlift pump 1 2010
8,518,256 Membrane module 0 2011
8,262,778 Membrane post treatment 0 2011
8,372,276 Membrane cleaning with pulsed airlift pump 0 2011
8,623,202 Infiltration/inflow control for membrane bioreactor 0 2012
8,840,783 Water treatment membrane cleaning with pulsed airlift pump 0 2013
 
GENERAL ELECTRIC COMPANY (1)
8,529,814 Supported hollow fiber membrane 1 2010
 
MITSUI MINING & SMELTING CO., LTD. (1)
5,312,614 Method for producing white electrically conductive zinc oxide 3 1990
 
SIEMENS WATER TECHNOLOGIES LLC (1)
8,758,622 Simple gas scouring method and apparatus 0 2005

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