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, GA303

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Muller, Heinz-Joachim Thornleigh, AU 22 595
Mullette, Daniel Toongabbie, AU 10 162

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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Other [Check patent profile for assignment information] (9)
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H1045 Air bubble leak detection test device 49 1990
5,364,527 Apparatus and process for treating water 58 1992
D396046 Steer device for an outboard motor 49 1996
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
D400890 Automotive manifold 55 1997
2004/0145,076 Scouring method 47 2004
 
COULTER ELECTRONICS, LTD. (1)
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4,670,145 Multiple bundle fluid separation apparatus 81 1986
 
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)
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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
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FORSCHUNGSZENTRUM KARLSRUHE GMBH (1)
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Memtec Japan Limited (1)
5,353,630 Apparatus for testing membrane filter integrity 78 1993
 
CUMMINS FILTRATION INC. (1)
2004/0094,459 LIQUID FILTER WITH SEPARATE AND CALIBRATED VAPOR RELEASE 1 2003
 
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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
 
DONALDSON COMPANY, INC. (1)
4,779,448 Photoelectric bubble detector apparatus and method 66 1986
 
KABUSHIKI KAISHA TOSHIBA (1)
4,756,875 Apparatus for filtering water containing radioactive substances in nuclear power plants 74 1986
 
MITSUBISHI RAYON CO., LTD. (2)
5,480,553 Hollow fiber membrane module 107 1993
6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly 82 1999
 
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. (2)
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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
 
NALCO COMPANY (1)
5,419,816 Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions 80 1993
 
ABC Group (1)
D396726 Combined air intake manifold and filter 51 1997
 
OTV SA (1)
5,607,593 Installation for making water potable with submerged filtering membranes 126 1994
 
E. I. DU PONT DE NEMOURS AND COMPANY (3)
5,137,631 Multiple bundle permeator 77 1991
5,320,760 Method of determining filter pluggage by measuring pressures 62 1992
5,470,469 Hollow fiber cartridge 109 1994
 
ORGANO CORPORATION (1)
5,525,220 Filtration equipment 49 1994
 
LYONNAISE DES EAUX-DUMEZ (1)
5,066,402 Method of changing operating modes in automatic water filtering apparatus using tubular membranes 109 1990
 
ZENON ENVIRONMENTAL INC. (11)
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
5,958,243 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
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
6,645,374 Membrane module for gas transfer and membrane supported biofilm process 69 2003
 
ZENON TECHNOLOGY PARTNERSHIP (15)
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
6,042,677 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
6,375,848 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
6,550,747 Cyclic aeration system for submerged membrane modules 68 2001
6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes 72 2001
 
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
 
ELECTRIC POWER RESEARCH INSTITUTE, INC. (1)
5,005,430 Automated membrane filter sampler 66 1990
 
ASAHI KASEI KABUSHIKI KAISHA (2)
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
 
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
 
SUMITOMO HEAVY INDUSTRIES, LTD. (1)
6,284,135 Membrane filter apparatus with gas discharge cleaning means 75 1998
 
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
 
IONICS, INCORPORATED (1)
5,066,375 Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack 123 1990
 
HENKEL CHILE S.A. (HENKEL CHILE) (1)
* 6,727,305 Filler-containing polymer dispersion, method for its production and its use 51 2001
 
U.S. FILTER/IONPURE, INC. (1)
4,687,561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions 116 1985
 
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
 
ADVANCED CARDIOVASCULAR SYSTEMS, INC. (1)
6,994,867 Biocompatible carrier containing L-arginine 55 2002
 
Micron Separations, Inc. (1)
5,411,663 Alcohol-insoluble nylon microporous membranes 50 1993
 
JGC Corporation (1)
4,540,490 Apparatus for filtration of a suspension 89 1983
 
MILLIPORE INVESTMENT HOLDINGS LIMITED (1)
4,632,745 Electrodeionization apparatus 167 1985
 
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
 
X-FLOW B.V. (1)
5,076,925 Process for preparing a microporous membrane and such a membrane 86 1990
 
Mobil Oil Corporation (2)
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
 
PALL CORPORATION (11)
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
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
 
TEIJIN LIMITED (1)
4,388,189 Process for preparation of improved semipermeable composite membranes 83 1980
 
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
 
MOCON, INC (1)
4,660,411 Apparatus for measuring transmission of volatile substances through films 69 1985
 
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 (1)
5,275,766 Method for making semi-permeable polymer membranes 54 1992
 
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
 
TOYO BOSEKI KABUSHIKI KAISHA (1)
4,451,369 Fluid separation apparatus 114 1981
 
FUJIFILM MANUFACTURING EUROPE B.V. (1)
6,890,645 Photocatalytic sheet or film and its manufacturing process 49 2001
 
OSMONICS, INC. (1)
4,846,970 Cross-flow filtration membrane test unit 88 1987
 
EVOQUA WATER TECHNOLOGIES LLC (11)
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
6,641,733 Apparatus and method for cleaning membrane filtration modules 62 2002
6,884,350 Modified membranes 51 2003
 
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
 
D.W. WALKER & ASSOCIATES (1)
5,198,116 Method and apparatus for measuring the fouling potential of membrane system feeds 66 1992
 
MEMCOR, INC., A CORP. OF DE (1)
4,614,109 Method and device for testing the permeability of membrane filters 84 1985
 
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
 
ASAHI GLASS COMPANY, LIMITED (1)
4,385,150 Organic solution of fluorinated copolymer having carboxylic acid groups 64 1981
 
PALL FILTRATION AND SEPARATIONS GROUP INC. (1)
6,146,747 Highly porous polyvinylidene difluoride membranes 81 1998
 
USFILTER CORPORATION (1)
4,636,296 Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions 112 1985
 
SIEMENS WATER TECHNOLOGIES CORP. (4)
5,094,750 Hollow fibre filter cartridge and header 59 1989
5,194,149 Filter cartridge manifold 64 1991
5,405,528 Modular microporous filter assemblies 82 1992
2004/0217,053 Method of cleaning membrane modules 50 2004
 
3M INNOVATIVE PROPERTIES COMPANY (4)
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
 
LOCTITE CORPORATION (1)
5,135,663 Method of treating (meth)acrylic monomer-containing wastewater 51 1991
 
CELGARD LLC (1)
* 5,043,113 Process for formation of halogenated polymeric microporous membranes having improved strength properties 48 1990
 
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
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
5,104,546 Pyrogens separations by ceramic ultrafiltration 80 1990
 
SCIMAT LIMITED (1)
* 5,198,162 Microporous films 60 1989
 
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
 
EBARA CORPORATION (2)
4,775,471 Hollow fiber filter device 69 1986
4,876,006 Hollow fiber filter device 121 1988
 
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
 
UNITED PET GROUP, INC. (1)
5,401,401 Hang on tank canister filter 79 1993
 
Exxon Research and Engineering Company (1)
* 5,396,019 Fluorinated polyolefin membranes for aromatics/saturates separation 61 1993
 
EASTMAN KODAK COMPANY (1)
6,721,529 Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat 72 2001
 
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
 
SIEMENS INDUSTRY, INC. (1)
5,643,455 Concentration of solids in a suspension using hollow fibre membranes 111 1995
 
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
 
BASF AKTIENGESELLSCHAFT (1)
6,264,839 Phosphonomethylated polyvinylamines and preparation and use thereof 53 1993
 
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
 
U.S. FILTER WASTEWATER GROUP, INC. (8)
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
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
GENERAL ELECTRIC COMPANY (3)
8,529,814 Supported hollow fiber membrane 3 2010
9,022,229 Composite membrane with compatible support filaments 0 2012
8,999,454 Device and process for producing a reinforced hollow fibre membrane 0 2012
 
BL TECHNOLOGIES, INC. (1)
9,061,250 Non-braided, textile-reinforced hollow fiber membrane 0 2010
 
SIEMENS WATER TECHNOLOGIES LLC (1)
8,758,622 Simple gas scouring method and apparatus 0 2005
 
EVOQUA WATER TECHNOLOGIES LLC (40)
7,938,966 Backwash method 27 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 38 2005
8,524,794 Hydrophilic membranes 0 2005
7,931,463 Apparatus for potting membranes 25 2005
7,862,719 Square membrane manifold system 29 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 30 2006
7,591,950 Submerged cross-flow filtration 31 2006
8,858,796 Assembly for water filtration using a tube manifold to minimise backwash 0 2006
7,563,363 System for treating wastewater 29 2006
* 7,632,439 Poly(ethylene chlorotrifluoroethylene) membranes 32 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 29 2008
8,622,222 Membrane cleaning with pulsed airlift pump 0 2008
7,718,065 Filtration method and apparatus 27 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
8,057,574 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 1 2011
8,262,778 Membrane post treatment 0 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
 
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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