US Patent No: 7,247,238

Number of patents in Portfolio can not be more than 2000

Poly(ethylene chlorotrifluoroethylene) membranes

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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, GA261

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Muller, Heinz-Joachim Thornleigh, AU 26 465
Mullette, Daniel Westmead, AU 18 125

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ZENON ENVIRONMENTAL INC. (13)
5,227,063 Tubular membrane module 53 1990
5,104,535 Frameless array of hollow fiber membranes and module containing a stack of arrays 62 1990
5,182,019 Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges 65 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 147 1992
5,403,479 In situ cleaning system for fouled membranes 92 1993
5,958,243 Apparatus and method for membrane filtration with enhanced net flux 60 1997
5,910,250 Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers 97 1997
5,914,039 Filtration membrane with calcined .alpha.-alumina particles therein 70 1997
5,944,997 System for maintaining a clean skein of hollow fibers while filtering suspended solids 111 1998
6,045,698 Method for cleaning a filtration installation of the type with immersed membranes 69 1998
6,024,872 Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom 64 1999
6,214,231 System for operation of multiple membrane filtration assemblies 68 1999
6,645,374 Membrane module for gas transfer and membrane supported biofilm process 57 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 138 1995
5,783,083 Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces 129 1996
6,042,677 Potted header for hollow fiber membranes and method for making it 80 1999
RE37549 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 71 1999
6,354,444 Hollow fiber membrane and braided tubular support therefor 72 1999
6,193,890 System for maintaining a clean skein of hollow fibers while filtering suspended solids 92 1999
6,375,848 Water filtration using immersed membranes 59 1999
6,245,239 Cyclic aeration system for submerged membrane modules 72 2000
6,325,928 Immersed membrane element and module 68 2000
6,294,039 Potted header for hollow fiber membranes 65 2000
6,893,568 Immersed membrane filtration system and overflow process 45 2000
6,550,747 Cyclic aeration system for submerged membrane modules 57 2001
6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes 60 2001
 
EVOQUA WATER TECHNOLOGIES LLC (11)
6,159,373 Cleaning of hollow fibre membranes 49 1997
6,077,435 Filtration monitoring and control system 80 1998
6,156,200 Gas-scrubbed hollow fiber membrane module 96 1998
6,254,773 Microporous membrane filtration assembly 55 1999
6,555,005 Scouring method 69 1999
6,202,475 Predicting logarithmic reduction values 50 1999
D478913 Manifold header 40 2000
D462699 Manifold header cap 47 2000
6,524,481 Apparatus and method for cleaning membrane filtration modules 64 2001
6,641,733 Apparatus and method for cleaning membrane filtration modules 50 2002
6,884,350 Modified membranes 41 2003
 
PALL CORPORATION (11)
4,340,479 Process for preparing hydrophilic polyamide membrane filter media and product 213 1980
4,431,545 Microporous filter system and process 88 1982
4,609,465 Filter cartridge with a connector seal 121 1984
4,702,840 Charge modified polyamide membrane 79 1986
5,417,101 Method and apparatus for testing the integrity of filter elements 72 1992
6,045,899 Highly assymetric, hydrophilic, microfiltration membranes having large pore diameters 112 1996
6,083,393 Hydrophilic membrane 56 1997
6,039,872 Hydrophilic membrane 57 1998
6,770,202 Porous membrane 52 2002
6,811,696 Hydrophobic membrane materials for filter venting applications 37 2002
6,884,375 Hydrophobic membrane materials for filter venting applications 43 2004
 
U.S. FILTER WASTEWATER GROUP, INC. (8)
4,931,186 Concentration of solids in a suspension 60 1986
4,767,539 Cleaning of hollow fiber filters utilized in lumenal gas flow 66 1987
4,876,012 Hollow fibre filter cartridge and header 54 1988
5,024,762 Concentration of solids in a suspension 56 1990
2002/0148,767 Membrane filtration manifold system 46 2001
2003/0178,365 Scouring method 46 2003
2003/0226,797 Fibre membrane arrangement 43 2003
2004/0084,369 Scouring method 37 2003
 
The Dow Chemical Company (6)
4,656,865 System for analyzing permeation of a gas or vapor through a film or membrane 72 1985
4,797,187 Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups 59 1987
4,904,426 Process for the production of fibers from poly(etheretherketone)-type polymers 46 1988
4,963,304 Process for preparing microporous membranes 52 1988
5,015,275 Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same 44 1989
5,221,478 Chromatographic separation using ion-exchange resins 49 1992
 
Memtec Limited (5)
4,816,160 Cooling hollow fibre cross-flow separators 54 1986
4,793,932 Variable volume filter or concentrator 62 1986
4,935,143 Cleaning of filters 61 1988
4,921,610 Cleaning of hollow fibre filters 85 1988
5,918,264 Fiber monitoring system 50 1995
 
3M INNOVATIVE PROPERTIES COMPANY (4)
6,096,213 Puncture-resistant polyolefin membranes 60 1998
6,277,512 Polymer electrolyte membranes from mixed dispersions 79 1999
6,423,784 Acid functional fluoropolymer membranes and method of manufacture 56 1999
6,790,912 Extrudable fluoropolymer blends 43 2001
 
SIEMENS WATER TECHNOLOGIES CORP. (4)
5,094,750 Hollow fibre filter cartridge and header 49 1989
5,194,149 Filter cartridge manifold 53 1991
5,405,528 Modular microporous filter assemblies 70 1992
2004/0217,053 Method of cleaning membrane modules 39 2004
 
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA (3)
4,623,670 Porous fluorine resin membrane and process for preparing the same 51 1985
4,702,836 Porous fluorine resin membrane and process for preparing the same 51 1986
6,495,041 Method for purifying aqueous suspension 40 2001
 
E. I. DU PONT DE NEMOURS AND COMPANY (3)
5,137,631 Multiple bundle permeator 65 1991
5,320,760 Method of determining filter pluggage by measuring pressures 52 1992
5,470,469 Hollow fiber cartridge 93 1994
 
Japan Organo Co., Ltd. (3)
4,886,601 Column filter using bundles of long fibers 57 1989
5,209,852 Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module 88 1991
5,151,191 Filtration process using hollow fiber membrane module 70 1991
 
KUBOTA CORPORATION (3)
5,192,456 Apparatus for treating activated sludge and method of cleaning it 104 1992
5,451,317 Solid-liquid separator 57 1994
5,647,988 Method of back-washing submerged-type ceramic membrane separation apparatus 71 1994
 
MEDIVATORS INC. (3)
5,543,002 Method of manufacture of hollow fiber filter cartridge with porous ring 54 1994
5,554,283 Hollow fiber filter having a porous collar/ring seal 70 1995
5,531,848 Method of manufacturing of hollow fiber cartridge with porous ring 59 1995
 
MILLIPORE CORPORATION (3)
5,079,272 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 72 1989
5,211,823 Process for purifying resins utilizing bipolar interface 82 1991
5,158,721 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 60 1991
 
TEIJIN LIMITED (3)
4,302,336 Semipermeable composite membrane 69 1979
4,353,802 Semipermeable composite membrane 56 1979
4,388,189 Process for preparation of improved semipermeable composite membranes 72 1980
 
AKZO N.V. (2)
4,744,240 Method for determining the bubble point or the largest pore of membranes or of filter materials 65 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 66 1990
 
ASAHI KASEI KABUSHIKI KAISHA (2)
6,299,773 Porous polyvinylidene fluoride resin film and process for producing the same 48 1999
6,322,703 Method for purifying aqueous suspension 40 2000
 
EBARA CORPORATION (2)
4,775,471 Hollow fiber filter device 58 1986
4,876,006 Hollow fiber filter device 110 1988
 
KOCH MEMBRANE SYSTEMS, INC. (2)
6,074,718 Self supporting hollow fiber membrane and method of construction 44 1996
6,890,435 Hollow fiber microfiltration membranes and a method of making these membranes 48 2002
 
MEMBRANA GMBH (2)
4,708,799 Hollow fiber membrane for plasma separation 56 1985
4,968,733 Process for producing microporous powders and membranes 86 1989
 
MILLIPORE INVESTMENT HOLDINGS LIMITED (2)
4,203,848 Processes of making a porous membrane material from polyvinylidene fluoride, and products 109 1977
4,632,745 Electrodeionization apparatus 148 1985
 
MITSUBISHI RAYON CO., LTD. (2)
5,480,553 Hollow fiber membrane module 93 1993
6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly 68 1999
 
Mobil Oil Corporation (2)
5,069,065 Method for measuring wettability of porous rock 67 1991
5,297,420 Apparatus and method for measuring relative permeability and capillary pressure of porous rock 71 1993
 
NEPHROS, INC. (2)
6,315,895 Dual-stage hemodiafiltration cartridge 47 1999
6,635,179 Sterile fluid filtration cartridge and method for using same 45 1999
 
PTI TECHNOLOGIES, INC. (2)
4,218,324 Filter element having removable filter media member 64 1979
4,812,235 Filter element assembly replaceable mesh pack 59 1983
 
SPECIALTY MATERIALS INC. (2)
4,384,474 Method and apparatus for testing and using membrane filters in an on site of use housing 67 1981
4,888,115 Cross-flow filtration 61 1983
 
USF FILTRATION AND SEPARATIONS GROUP INC. (2)
4,629,563 Asymmetric membranes 237 1981
5,906,742 Microfiltration membranes having high pore density and mixed isotropic and anisotropic structure 68 1997
 
ABC Group (1)
D396726 Combined air intake manifold and filter 41 1997
 
ADVANCED CARDIOVASCULAR SYSTEMS, INC. (1)
6,994,867 Biocompatible carrier containing L-arginine 43 2002
 
Akzona Incorporated (1)
4,247,498 Methods for making microporous products 213 1978
 
ASAHI GLASS COMPANY, LIMITED (1)
4,385,150 Organic solution of fluorinated copolymer having carboxylic acid groups 54 1981
 
BASF AKTIENGESELLSCHAFT (1)
6,264,839 Phosphonomethylated polyvinylamines and preparation and use thereof 41 1993
 
Baxter Travenol Laboratories, Inc. (1)
4,248,648 Method of repairing leaks in a hollow capillary fiber diffusion device 56 1979
 
CELGARD LLC (1)
5,043,113 Process for formation of halogenated polymeric microporous membranes having improved strength properties 38 1990
 
CHAPIN MANUFACTURING, INC. (1)
6,440,303 Fluid filter 55 2001
 
CHEMFAB CORPORATION (1)
5,075,065 Method for manufacturing of cast films at high productivity 47 1989
 
Clack Corporation (1)
5,389,260 Brine seal for tubular filter 73 1993
 
CMS TECHNOLOGIES HOLDINGS, INC. (1)
6,221,247 Dioxole coated membrane module for ultrafiltration or microfiltration of aqueous suspensions 50 1999
 
CORNING INCORPORATED (1)
5,275,766 Method for making semi-permeable polymer membranes 44 1992
 
COULTER ELECTRONICS, LTD. (1)
4,718,270 Porosimeter and methods of assessing porosity 62 1985
 
D.W. WALKER & ASSOCIATES (1)
5,198,116 Method and apparatus for measuring the fouling potential of membrane system feeds 55 1992
 
DELAWARE PMC-SIERRA, INC. (1)
5,479,590 Anti-aliasing method for polynomial curves using integer arithmetics 51 1994
 
Donaldson Company, Inc. (1)
4,779,448 Photoelectric bubble detector apparatus and method 56 1986
 
Dragerwerk Aktiengesellschaft (1)
4,840,227 Process for producing a hollow fiber mass transfer module and module produced by this process 44 1988
 
DRM, DR MULLER AG (1)
4,511,471 Filter apparatus for continuously thickening suspensions 53 1983
 
EASTMAN KODAK COMPANY (1)
6,721,529 Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat 61 2001
 
ECO-TEC LIMITED (1)
4,673,507 Fluid treatment process and apparatus 58 1985
 
Electric Power Research Institute, Inc. (1)
5,005,430 Automated membrane filter sampler 56 1990
 
Exxon Research and Engineering Company (1)
5,396,019 Fluorinated polyolefin membranes for aromatics/saturates separation 50 1993
 
FILTERWERK MANN & HUMMEL GMBH (1)
4,688,511 Dirt accumulation indicator for air intake filters 77 1985
 
FORSCHUNGSZENTRUM KARLSRUHE GMBH (1)
4,797,211 Cross flow microfilter 99 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 57 1990
 
FUJIFILM MANUFACTURING EUROPE B.V. (1)
6,890,645 Photocatalytic sheet or film and its manufacturing process 39 2001
 
HENKEL CHILE S.A. (HENKEL CHILE) (1)
6,727,305 Filler-containing polymer dispersion, method for its production and its use 40 2001
 
Industrial Air, Inc. (1)
4,193,780 Air filter construction 64 1978
 
IONICS, INCORPORATED (1)
5,066,375 Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack 104 1990
 
JGC CORPORATION (1)
4,540,490 Apparatus for filtration of a suspension 78 1983
 
Kabushiki Kaisha Ito Tekkousho (1)
4,647,377 Filter apparatus 79 1984
 
KABUSHIKI KAISHA TOSHIBA (1)
4,756,875 Apparatus for filtering water containing radioactive substances in nuclear power plants 63 1986
 
KINETICO INCORPORATED (1)
4,650,586 Fluid treatment system 61 1985
 
KURARAY CO., LTD. (1)
4,547,289 Filtration apparatus using hollow fiber membrane 78 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 71 1986
 
LIFESHIELD SCIENCES LLC (1)
2004/0158,312 Braided endoluminal device having tapered filaments 3 2003
 
LOCTITE CORPORATION (1)
5,135,663 Method of treating (meth)acrylic monomer-containing wastewater 41 1991
 
LYONNAISE DES EAUX-DUMEZ (1)
5,066,402 Method of changing operating modes in automatic water filtering apparatus using tubular membranes 94 1990
 
Massey-Ferguson Inc. (1)
4,192,750 Stackable filter head unit 88 1978
 
MEMCOR, INC., A CORP. OF DE (1)
4,614,109 Method and device for testing the permeability of membrane filters 72 1985
 
Memtec Japan Limited (1)
5,353,630 Apparatus for testing membrane filter integrity 67 1993
 
Micron Separations, Inc. (1)
5,411,663 Alcohol-insoluble nylon microporous membranes 40 1993
 
MOCON, INC. (1)
4,660,411 Apparatus for measuring transmission of volatile substances through films 59 1985
 
NALCO COMPANY (1)
5,419,816 Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions 68 1993
 
ORGANO CORPORATION (1)
5,525,220 Filtration equipment 38 1994
 
OSMONICS, INC. (1)
4,846,970 Cross-flow filtration membrane test unit 75 1987
 
OTV SA (1)
5,607,593 Installation for making water potable with submerged filtering membranes 112 1994
 
PALL FILTRATION AND SEPARATIONS GROUP INC. (1)
6,146,747 Highly porous polyvinylidene difluoride membranes 67 1998
 
PALL SEITZSCHENK FILTERSYSTEMS GMBH (1)
6,974,554 Potting method 36 2003
 
PBI-DANSENSOR A/S (1)
5,138,870 Apparatus for measuring water vapor permeability through sheet materials 57 1991
 
Rhone-Poulenc Recherches (1)
4,810,384 Hydrophilic PVDF semipermeable membrane 71 1987
 
SCIMAT LIMITED (1)
5,198,162 Microporous films 50 1989
 
SECURTIY STATE BANK OF PINE ISLAND (1)
5,361,625 Method and device for the measurement of barrier properties of films against gases 62 1993
 
SIEMENS INDUSTRY, INC. (1)
5,643,455 Concentration of solids in a suspension using hollow fibre membranes 99 1995
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
5,104,546 Pyrogens separations by ceramic ultrafiltration 70 1990
 
SNECMA (1)
5,477,731 Method and apparatus for detecting a fouled fluid filter 62 1994
 
Standard Oil Company (Indiana) (1)
4,188,817 Method for detecting membrane leakage 56 1978
 
STUDIECENTRUM VOOR KERNENERGIE, SCK (1)
4,253,936 Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder 39 1980
 
SUMITOMO HEAVY INDUSTRIES, LTD. (1)
6,284,135 Membrane filter apparatus with gas discharge cleaning means 64 1998
 
TOYO BOSEKI KABUSHIKI KAISHA (1)
4,451,369 Fluid separation apparatus 102 1981
 
U.S. FILTER/IONPURE, INC. (1)
4,687,561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions 99 1985
 
UNITED PET GROUP, INC. (1)
5,401,401 Hang on tank canister filter 68 1993
 
UNITED STATES FILTER CORPORATION (1)
4,636,296 Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions 97 1985
 
UNIVERSITY OF ARIZONA (1)
5,531,900 Modification of polyvinylidene fluoride membrane and method of filtering 63 1994
 
WATER PURE INC. (1)
4,784,771 Method and apparatus for purifying fluids 74 1987
 
X-FLOW B.V. (1)
5,076,925 Process for preparing a microporous membrane and such a membrane 76 1990
 
YAMAHA HATSUDOKI KABUSHIKI KAISHA (1)
4,763,612 Intake system for internal combustion engine 56 1987
 
ZAO STC "VALDIPOR" (1)
5,988,400 Pourous fluorocarbon membrane, method for producing thereof and cartridge filter based on said membrane 47 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 49 1978
4,642,182 Multiple-disc type filter with extensible support 69 1985
4,999,038 Filter unit 89 1989
H1045 Air bubble leak detection test device 43 1990
5,364,527 Apparatus and process for treating water 48 1992
D396046 Steer device for an outboard motor 39 1996
6,048,454 Oil filter pack and assembly 70 1997
5,942,113 Solid-liquid separating filter medium for sewage, waste water, etc 50 1997
D400890 Automotive manifold 45 1997
2004/0145,076 Scouring method 37 2004

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
EVOQUA WATER TECHNOLOGIES LLC (31)
7,938,966 Backwash method 16 2003
8,372,282 Mixing chamber 0 2003
8,268,176 Backwash 0 2004
7,387,723 Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials 25 2005
8,524,794 Hydrophilic membranes 0 2005
7,931,463 Apparatus for potting membranes 15 2005
7,862,719 Square membrane manifold system 16 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 19 2006
7,591,950 Submerged cross-flow filtration 19 2006
7,563,363 System for treating wastewater 17 2006
7,632,439 Poly(ethylene chlorotrifluoroethylene) membranes 21 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 18 2008
8,622,222 Membrane cleaning with pulsed airlift pump 0 2008
7,718,065 Filtration method and apparatus 17 2008
7,718,057 Wastewater treatment system 17 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
 
GENERAL ELECTRIC COMPANY (1)
8,529,814 Supported hollow fiber membrane 0 2010
 
MITSUI MINING & SMELTING CO., LTD. (1)
5,312,614 Method for producing white electrically conductive zinc oxide 3 1990

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