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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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EVOQUA WATER TECHNOLOGIES LLCALPHARETTA, GA291

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Muller, Heinz-Joachim Thornleigh, AU 26 564
Mullette, Daniel Westmead, AU 18 161

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Kabushiki Kaisha Ito Tekkousho (1)
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Other [Check patent profile for assignment information] (9)
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4,999,038 Filter unit 99 1989
H1045 Air bubble leak detection test device 49 1990
5,364,527 Apparatus and process for treating water 56 1992
D396046 Steer device for an outboard motor 47 1996
6,048,454 Oil filter pack and assembly 78 1997
5,942,113 Solid-liquid separating filter medium for sewage, waste water, etc 58 1997
D400890 Automotive manifold 53 1997
2004/0145,076 Scouring method 45 2004
 
COULTER ELECTRONICS, LTD. (1)
4,718,270 Porosimeter and methods of assessing porosity 70 1985
 
ZAO STC "VALDIPOR" (1)
5,988,400 Pourous fluorocarbon membrane, method for producing thereof and cartridge filter based on said membrane 55 1997
 
FILTERWERK MANN & HUMMEL GMBH (1)
4,688,511 Dirt accumulation indicator for air intake filters 85 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 66 1990
 
L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE (1)
4,670,145 Multiple bundle fluid separation apparatus 79 1986
 
STUDIECENTRUM VOOR KERNENERGIE, SCK (1)
* 4,253,936 Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder 47 1980
 
Memtec Limited (5)
4,816,160 Cooling hollow fibre cross-flow separators 62 1986
4,793,932 Variable volume filter or concentrator 70 1986
4,935,143 Cleaning of filters 70 1988
4,921,610 Cleaning of hollow fibre filters 93 1988
5,918,264 Fiber monitoring system 58 1995
 
FORSCHUNGSZENTRUM KARLSRUHE GMBH (1)
4,797,211 Cross flow microfilter 107 1986
 
Memtec Japan Limited (1)
5,353,630 Apparatus for testing membrane filter integrity 75 1993
 
CUMMINS FILTRATION INC. (1)
2004/0094,459 LIQUID FILTER WITH SEPARATE AND CALIBRATED VAPOR RELEASE 2003
 
YAMAHA HATSUDOKI KABUSHIKI KAISHA (1)
4,763,612 Intake system for internal combustion engine 64 1987
 
SECURTIY STATE BANK OF PINE ISLAND (1)
5,361,625 Method and device for the measurement of barrier properties of films against gases 70 1993
 
Donaldson Company, Inc. (1)
4,779,448 Photoelectric bubble detector apparatus and method 64 1986
 
KABUSHIKI KAISHA TOSHIBA (1)
4,756,875 Apparatus for filtering water containing radioactive substances in nuclear power plants 72 1986
 
MITSUBISHI RAYON CO., LTD. (2)
5,480,553 Hollow fiber membrane module 105 1993
6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly 79 1999
 
SNECMA (1)
5,477,731 Method and apparatus for detecting a fouled fluid filter 71 1994
 
ECO-TEC LIMITED (1)
4,673,507 Fluid treatment process and apparatus 67 1985
 
CMS TECHNOLOGIES HOLDINGS, INC. (1)
6,221,247 Dioxole coated membrane module for ultrafiltration or microfiltration of aqueous suspensions 58 1999
 
AKZO N.V. (2)
4,744,240 Method for determining the bubble point or the largest pore of membranes or of filter materials 74 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 74 1990
 
NALCO COMPANY (1)
5,419,816 Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions 77 1993
 
ABC Group (1)
D396726 Combined air intake manifold and filter 49 1997
 
OTV S.A. (1)
5,607,593 Installation for making water potable with submerged filtering membranes 124 1994
 
E. I. DU PONT DE NEMOURS AND COMPANY (3)
5,137,631 Multiple bundle permeator 74 1991
5,320,760 Method of determining filter pluggage by measuring pressures 60 1992
5,470,469 Hollow fiber cartridge 106 1994
 
ORGANO CORPORATION (1)
5,525,220 Filtration equipment 47 1994
 
LYONNAISE DES EAUX-DUMEZ (1)
5,066,402 Method of changing operating modes in automatic water filtering apparatus using tubular membranes 105 1990
 
ZENON ENVIRONMENTAL INC. (13)
5,227,063 Tubular membrane module 61 1990
5,104,535 Frameless array of hollow fiber membranes and module containing a stack of arrays 71 1990
5,182,019 Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges 75 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 159 1992
5,403,479 In situ cleaning system for fouled membranes 102 1993
5,958,243 Apparatus and method for membrane filtration with enhanced net flux 68 1997
5,910,250 Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers 108 1997
5,914,039 Filtration membrane with calcined .alpha.-alumina particles therein 81 1997
5,944,997 System for maintaining a clean skein of hollow fibers while filtering suspended solids 122 1998
6,045,698 Method for cleaning a filtration installation of the type with immersed membranes 78 1998
6,024,872 Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom 73 1999
6,214,231 System for operation of multiple membrane filtration assemblies 77 1999
6,645,374 Membrane module for gas transfer and membrane supported biofilm process 67 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 151 1995
5,783,083 Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces 140 1996
6,042,677 Potted header for hollow fiber membranes and method for making it 91 1999
RE37549 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 80 1999
6,354,444 Hollow fiber membrane and braided tubular support therefor 85 1999
6,193,890 System for maintaining a clean skein of hollow fibers while filtering suspended solids 102 1999
6,375,848 Water filtration using immersed membranes 68 1999
6,245,239 Cyclic aeration system for submerged membrane modules 83 2000
6,325,928 Immersed membrane element and module 80 2000
6,294,039 Potted header for hollow fiber membranes 75 2000
6,893,568 Immersed membrane filtration system and overflow process 53 2000
6,550,747 Cyclic aeration system for submerged membrane modules 66 2001
6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes 70 2001
 
WATER PURE INC. (1)
4,784,771 Method and apparatus for purifying fluids 82 1987
 
Dragerwerk Aktiengesellschaft (1)
4,840,227 Process for producing a hollow fiber mass transfer module and module produced by this process 52 1988
 
KURARAY CO., LTD. (1)
4,547,289 Filtration apparatus using hollow fiber membrane 86 1984
 
Electric Power Research Institute, Inc. (1)
5,005,430 Automated membrane filter sampler 64 1990
 
ASAHI KASEI KABUSHIKI KAISHA (2)
6,299,773 Porous polyvinylidene fluoride resin film and process for producing the same 56 1999
6,322,703 Method for purifying aqueous suspension 48 2000
 
PBI-DANSENSOR A/S (1)
5,138,870 Apparatus for measuring water vapor permeability through sheet materials 66 1991
 
KUBOTA CORPORATION (3)
5,192,456 Apparatus for treating activated sludge and method of cleaning it 115 1992
5,451,317 Solid-liquid separator 66 1994
5,647,988 Method of back-washing submerged-type ceramic membrane separation apparatus 80 1994
 
SUMITOMO HEAVY INDUSTRIES, LTD. (1)
6,284,135 Membrane filter apparatus with gas discharge cleaning means 73 1998
 
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA (3)
* 4,623,670 Porous fluorine resin membrane and process for preparing the same 60 1985
* 4,702,836 Porous fluorine resin membrane and process for preparing the same 59 1986
6,495,041 Method for purifying aqueous suspension 48 2001
 
IONICS, INCORPORATED (1)
5,066,375 Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack 117 1990
 
HENKEL CHILE S.A. (HENKEL CHILE) (1)
* 6,727,305 Filler-containing polymer dispersion, method for its production and its use 48 2001
 
U.S. FILTER/IONPURE, INC. (1)
4,687,561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions 111 1985
 
CHEMFAB CORPORATION (1)
* 5,075,065 Method for manufacturing of cast films at high productivity 58 1989
 
MILLIPORE CORPORATION (3)
5,079,272 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 80 1989
5,211,823 Process for purifying resins utilizing bipolar interface 93 1991
5,158,721 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 70 1991
 
ADVANCED CARDIOVASCULAR SYSTEMS, INC. (1)
6,994,867 Biocompatible carrier containing L-arginine 51 2002
 
Micron Separations, Inc. (1)
5,411,663 Alcohol-insoluble nylon microporous membranes 48 1993
 
JGC CORPORATION (1)
4,540,490 Apparatus for filtration of a suspension 87 1983
 
MILLIPORE INVESTMENT HOLDINGS LIMITED (1)
4,632,745 Electrodeionization apparatus 161 1985
 
SPECIALTY MATERIALS INC. (2)
4,384,474 Method and apparatus for testing and using membrane filters in an on site of use housing 77 1981
4,888,115 Cross-flow filtration 70 1983
 
X-FLOW B.V. (1)
5,076,925 Process for preparing a microporous membrane and such a membrane 84 1990
 
Mobil Oil Corporation (2)
5,069,065 Method for measuring wettability of porous rock 77 1991
5,297,420 Apparatus and method for measuring relative permeability and capillary pressure of porous rock 83 1993
 
PALL CORPORATION (11)
4,340,479 Process for preparing hydrophilic polyamide membrane filter media and product 225 1980
4,431,545 Microporous filter system and process 96 1982
4,609,465 Filter cartridge with a connector seal 133 1984
4,702,840 Charge modified polyamide membrane 87 1986
5,417,101 Method and apparatus for testing the integrity of filter elements 82 1992
6,045,899 Highly assymetric, hydrophilic, microfiltration membranes having large pore diameters 122 1996
6,083,393 Hydrophilic membrane 67 1997
6,039,872 Hydrophilic membrane 69 1998
* 6,770,202 Porous membrane 60 2002
6,811,696 Hydrophobic membrane materials for filter venting applications 45 2002
6,884,375 Hydrophobic membrane materials for filter venting applications 53 2004
 
TEIJIN LIMITED (1)
4,388,189 Process for preparation of improved semipermeable composite membranes 81 1980
 
MEMBRANA GMBH (2)
* 4,708,799 Hollow fiber membrane for plasma separation 64 1985
4,968,733 Process for producing microporous powders and membranes 98 1989
 
MOCON, INC. (1)
4,660,411 Apparatus for measuring transmission of volatile substances through films 67 1985
 
PTI TECHNOLOGIES, INC. (1)
4,812,235 Filter element assembly replaceable mesh pack 69 1983
 
CHAPIN MANUFACTURING, INC. (1)
6,440,303 Fluid filter 63 2001
 
CORNING INCORPORATED (1)
5,275,766 Method for making semi-permeable polymer membranes 52 1992
 
The Dow Chemical Company (6)
4,656,865 System for analyzing permeation of a gas or vapor through a film or membrane 80 1985
4,797,187 Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups 69 1987
4,904,426 Process for the production of fibers from poly(etheretherketone)-type polymers 54 1988
4,963,304 Process for preparing microporous membranes 61 1988
5,015,275 Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same 52 1989
5,221,478 Chromatographic separation using ion-exchange resins 57 1992
 
TOYO BOSEKI KABUSHIKI KAISHA (1)
4,451,369 Fluid separation apparatus 112 1981
 
FUJIFILM MANUFACTURING EUROPE B.V. (1)
6,890,645 Photocatalytic sheet or film and its manufacturing process 47 2001
 
OSMONICS, INC. (1)
4,846,970 Cross-flow filtration membrane test unit 85 1987
 
EVOQUA WATER TECHNOLOGIES LLC (11)
6,159,373 Cleaning of hollow fibre membranes 57 1997
6,077,435 Filtration monitoring and control system 90 1998
6,156,200 Gas-scrubbed hollow fiber membrane module 105 1998
6,254,773 Microporous membrane filtration assembly 65 1999
6,555,005 Scouring method 79 1999
6,202,475 Predicting logarithmic reduction values 58 1999
D478913 Manifold header 48 2000
D462699 Manifold header cap 55 2000
6,524,481 Apparatus and method for cleaning membrane filtration modules 74 2001
6,641,733 Apparatus and method for cleaning membrane filtration modules 59 2002
6,884,350 Modified membranes 49 2003
 
UNIVERSITY OF ARIZONA (1)
5,531,900 Modification of polyvinylidene fluoride membrane and method of filtering 73 1994
 
D.W. WALKER & ASSOCIATES (1)
5,198,116 Method and apparatus for measuring the fouling potential of membrane system feeds 63 1992
 
MEMCOR, INC., A CORP. OF DE (1)
4,614,109 Method and device for testing the permeability of membrane filters 82 1985
 
DELAWARE PMC-SIERRA, INC. (1)
5,479,590 Anti-aliasing method for polynomial curves using integer arithmetics 60 1994
 
MEDIVATORS INC. (3)
5,543,002 Method of manufacture of hollow fiber filter cartridge with porous ring 63 1994
5,554,283 Hollow fiber filter having a porous collar/ring seal 80 1995
5,531,848 Method of manufacturing of hollow fiber cartridge with porous ring 68 1995
 
Rhone-Poulenc Recherches (1)
4,810,384 Hydrophilic PVDF semipermeable membrane 79 1987
 
ASAHI GLASS COMPANY, LIMITED (1)
4,385,150 Organic solution of fluorinated copolymer having carboxylic acid groups 62 1981
 
PALL FILTRATION AND SEPARATIONS GROUP INC. (1)
6,146,747 Highly porous polyvinylidene difluoride membranes 76 1998
 
UNITED STATES FILTER CORPORATION (1)
4,636,296 Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions 108 1985
 
SIEMENS WATER TECHNOLOGIES CORP. (4)
5,094,750 Hollow fibre filter cartridge and header 57 1989
5,194,149 Filter cartridge manifold 62 1991
5,405,528 Modular microporous filter assemblies 79 1992
2004/0217,053 Method of cleaning membrane modules 48 2004
 
3M INNOVATIVE PROPERTIES COMPANY (4)
6,096,213 Puncture-resistant polyolefin membranes 73 1998
6,277,512 Polymer electrolyte membranes from mixed dispersions 92 1999
6,423,784 Acid functional fluoropolymer membranes and method of manufacture 65 1999
6,790,912 Extrudable fluoropolymer blends 51 2001
 
LOCTITE CORPORATION (1)
5,135,663 Method of treating (meth)acrylic monomer-containing wastewater 49 1991
 
CELGARD LLC (1)
* 5,043,113 Process for formation of halogenated polymeric microporous membranes having improved strength properties 46 1990
 
KOCH MEMBRANE SYSTEMS, INC. (2)
6,074,718 Self supporting hollow fiber membrane and method of construction 52 1996
6,890,435 Hollow fiber microfiltration membranes and a method of making these membranes 58 2002
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
5,104,546 Pyrogens separations by ceramic ultrafiltration 78 1990
 
SCIMAT LIMITED (1)
* 5,198,162 Microporous films 58 1989
 
NEPHROS, INC. (2)
6,315,895 Dual-stage hemodiafiltration cartridge 58 1999
6,635,179 Sterile fluid filtration cartridge and method for using same 55 1999
 
EBARA CORPORATION (2)
4,775,471 Hollow fiber filter device 67 1986
4,876,006 Hollow fiber filter device 119 1988
 
DRM, DR. MUELLER AG (1)
4,511,471 Filter apparatus for continuously thickening suspensions 61 1983
 
KINETICO INCORPORATED (1)
4,650,586 Fluid treatment system 70 1985
 
UNITED PET GROUP, INC. (1)
5,401,401 Hang on tank canister filter 77 1993
 
Exxon Research and Engineering Company (1)
* 5,396,019 Fluorinated polyolefin membranes for aromatics/saturates separation 58 1993
 
EASTMAN KODAK COMPANY (1)
6,721,529 Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat 70 2001
 
Clack Corporation (1)
5,389,260 Brine seal for tubular filter 83 1993
 
PALL SEITZSCHENK FILTERSYSTEMS GMBH (1)
6,974,554 Potting method 44 2003
 
SIEMENS INDUSTRY, INC. (1)
5,643,455 Concentration of solids in a suspension using hollow fibre membranes 109 1995
 
Japan Organo Co., Ltd. (3)
4,886,601 Column filter using bundles of long fibers 66 1989
5,209,852 Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module 97 1991
5,151,191 Filtration process using hollow fiber membrane module 79 1991
 
BASF AKTIENGESELLSCHAFT (1)
6,264,839 Phosphonomethylated polyvinylamines and preparation and use thereof 50 1993
 
USF FILTRATION AND SEPARATIONS GROUP INC. (2)
4,629,563 Asymmetric membranes 257 1981
5,906,742 Microfiltration membranes having high pore density and mixed isotropic and anisotropic structure 84 1997
 
U.S. FILTER WASTEWATER GROUP, INC. (8)
4,931,186 Concentration of solids in a suspension 69 1986
4,767,539 Cleaning of hollow fiber filters utilized in lumenal gas flow 76 1987
4,876,012 Hollow fibre filter cartridge and header 62 1988
5,024,762 Concentration of solids in a suspension 66 1990
2002/0148,767 Membrane filtration manifold system 54 2001
2003/0178,365 Scouring method 54 2003
2003/0226,797 Fibre membrane arrangement 51 2003
2004/0084,369 Scouring method 45 2003
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (1)
8,529,814 Supported hollow fiber membrane 1 2010
 
SIEMENS WATER TECHNOLOGIES LLC (1)
8,758,622 Simple gas scouring method and apparatus 0 2005
 
EVOQUA WATER TECHNOLOGIES LLC (38)
7,938,966 Backwash method 25 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 36 2005
8,524,794 Hydrophilic membranes 0 2005
7,931,463 Apparatus for potting membranes 23 2005
7,862,719 Square membrane manifold system 25 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 28 2006
7,591,950 Submerged cross-flow filtration 29 2006
8,858,796 Assembly for water filtration using a tube manifold to minimise backwash 0 2006
7,563,363 System for treating wastewater 26 2006
* 7,632,439 Poly(ethylene chlorotrifluoroethylene) membranes 30 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 26 2008
8,622,222 Membrane cleaning with pulsed airlift pump 0 2008
7,718,065 Filtration method and apparatus 25 2008
7,718,057 Wastewater treatment system 25 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
8,057,574 Membrane post treatment 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 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
8,894,858 Method and assembly for water filtration using a tube manifold to minimize backwash 0 2014
 
MITSUI MINING & SMELTING CO., LTD. (1)
5,312,614 Method for producing white electrically conductive zinc oxide 3 1990
 
ASAHI GLASS COMPANY, LIMITED (1)
8,952,083 Fluorocopolymer composition and its production process 0 2011
* Cited By Examiner

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