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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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, GA307

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Muller, Heinz-Joachim Thornleigh, AU 22 655
Mullette, Daniel Toongabbie, AU 10 207

Cited Art Landscape

Patent Info (Count) # Cites Year
 
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Other [Check patent profile for assignment information] (9)
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4,999,038 Filter unit 107 1989
H1045 Air bubble leak detection test device 50 1990
5,364,527 Apparatus and process for treating water 59 1992
D396046 Steer device for an outboard motor 50 1996
6,048,454 Oil filter pack and assembly 81 1997
5,942,113 Solid-liquid separating filter medium for sewage, waste water, etc 61 1997
D400890 Automotive manifold 56 1997
2004/0145,076 Scouring method 48 2004
 
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5,151,193 Polymer membranes on the basis of polyvinylidene fluoride, a process for the production thereof and their use 69 1990
 
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4,670,145 Multiple bundle fluid separation apparatus 82 1986
 
STUDIECENTRUM VOOR KERNENERGIE, SCK (1)
* 4,253,936 Method of preparing a membrane consisting of polyantimonic acid powder and an organic binder 57 1980
 
MEMTEC LTD (5)
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4,793,932 Variable volume filter or concentrator 75 1986
4,935,143 Cleaning of filters 73 1988
4,921,610 Cleaning of hollow fibre filters 97 1988
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FORSCHUNGSZENTRUM KARLSRUHE GMBH (1)
4,797,211 Cross flow microfilter 112 1986
 
Memtec Japan Limited (1)
5,353,630 Apparatus for testing membrane filter integrity 79 1993
 
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2004/0094,459 LIQUID FILTER WITH SEPARATE AND CALIBRATED VAPOR RELEASE 2 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 73 1993
 
Donaldson Company, Inc. (1)
4,779,448 Photoelectric bubble detector apparatus and method 67 1986
 
KABUSHIKI KAISHA TOSHIBA (1)
4,756,875 Apparatus for filtering water containing radioactive substances in nuclear power plants 75 1986
 
MITSUBISHI RAYON CO., LTD. (2)
5,480,553 Hollow fiber membrane module 109 1993
6,280,626 Membrane separator assembly and method of cleaning the assembly utilizing gas diffuser underneath the assembly 84 1999
 
SNECMA (1)
5,477,731 Method and apparatus for detecting a fouled fluid filter 74 1994
 
ECO-TEC LIMITED (1)
4,673,507 Fluid treatment process and apparatus 74 1985
 
CMS TECHNOLOGIES HOLDINGS, INC. (1)
6,221,247 Dioxole coated membrane module for ultrafiltration or microfiltration of aqueous suspensions 63 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 86 1990
 
NALCO COMPANY (1)
5,419,816 Electrolytic process and apparatus for the controlled oxidation of inorganic and organic species in aqueous solutions 83 1993
 
ABC Group (1)
D396726 Combined air intake manifold and filter 52 1997
 
OTV SA (1)
5,607,593 Installation for making water potable with submerged filtering membranes 128 1994
 
E. I. DU PONT DE NEMOURS AND COMPANY (3)
5,137,631 Multiple bundle permeator 79 1991
5,320,760 Method of determining filter pluggage by measuring pressures 63 1992
5,470,469 Hollow fiber cartridge 113 1994
 
ORGANO CORPORATION (1)
5,525,220 Filtration equipment 50 1994
 
Lyonnaise Des Eaux-Dumez S.A. (1)
5,066,402 Method of changing operating modes in automatic water filtering apparatus using tubular membranes 110 1990
 
ZENON ENVIRONMENTAL INC. (11)
5,227,063 Tubular membrane module 64 1990
5,104,535 Frameless array of hollow fiber membranes and module containing a stack of arrays 76 1990
5,182,019 Cartridge of hybrid frameless arrays of hollow fiber membranes and module containing an assembly of cartridges 79 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 162 1992
5,403,479 In situ cleaning system for fouled membranes 105 1993
5,958,243 Apparatus and method for membrane filtration with enhanced net flux 72 1997
5,914,039 Filtration membrane with calcined .alpha.-alumina particles therein 92 1997
5,944,997 System for maintaining a clean skein of hollow fibers while filtering suspended solids 125 1998
6,045,698 Method for cleaning a filtration installation of the type with immersed membranes 81 1998
6,024,872 Method of making a dope comprising hydrophilized PVDF and .alpha.-alumina, and a membrane made therefrom 84 1999
6,645,374 Membrane module for gas transfer and membrane supported biofilm process 71 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 160 1995
5,783,083 Vertical cylindrical skein of hollow fiber membranes and method of maintaining clean fiber surfaces 147 1996
5,910,250 Baffle for conversion of fine bubbles to coarse while filtering with a vertical skein of hollow fibers 113 1997
6,042,677 Potted header for hollow fiber membranes and method for making it 95 1999
RE37549 Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate 83 1999
6,354,444 Hollow fiber membrane and braided tubular support therefor 100 1999
6,214,231 System for operation of multiple membrane filtration assemblies 81 1999
6,193,890 System for maintaining a clean skein of hollow fibers while filtering suspended solids 107 1999
6,375,848 Water filtration using immersed membranes 76 1999
6,245,239 Cyclic aeration system for submerged membrane modules 99 2000
6,325,928 Immersed membrane element and module 84 2000
6,294,039 Potted header for hollow fiber membranes 80 2000
6,893,568 Immersed membrane filtration system and overflow process 56 2000
6,550,747 Cyclic aeration system for submerged membrane modules 71 2001
6,620,319 Apparatus for withdrawing permeate using an immersed vertical skein of hollow fibre membranes 77 2001
 
WATER PURE INC. (1)
4,784,771 Method and apparatus for purifying fluids 86 1987
 
DRAGERWERK AG (1)
4,840,227 Process for producing a hollow fiber mass transfer module and module produced by this process 55 1988
 
KURARAY CO., LTD. (1)
4,547,289 Filtration apparatus using hollow fiber membrane 89 1984
 
ELECTRIC POWER RESEARCH INSTITUTE, INC. (1)
5,005,430 Automated membrane filter sampler 67 1990
 
ASAHI KASEI KABUSHIKI KAISHA (2)
6,299,773 Porous polyvinylidene fluoride resin film and process for producing the same 59 1999
6,322,703 Method for purifying aqueous suspension 51 2000
 
PBI DANSENSOR A/S (1)
5,138,870 Apparatus for measuring water vapor permeability through sheet materials 69 1991
 
KUBOTA CORPORATION (3)
5,192,456 Apparatus for treating activated sludge and method of cleaning it 118 1992
5,451,317 Solid-liquid separator 70 1994
5,647,988 Method of back-washing submerged-type ceramic membrane separation apparatus 85 1994
 
SUMITOMO HEAVY INDUSTRIES, LTD. (1)
6,284,135 Membrane filter apparatus with gas discharge cleaning means 76 1998
 
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA (3)
* 4,623,670 Porous fluorine resin membrane and process for preparing the same 67 1985
* 4,702,836 Porous fluorine resin membrane and process for preparing the same 69 1986
6,495,041 Method for purifying aqueous suspension 51 2001
 
IONICS, INCORPORATED (1)
5,066,375 Introducing and removing ion-exchange and other particulates from an assembled electrodeionization stack 124 1990
 
HENKEL CHILE S.A. (1)
* 6,727,305 Filler-containing polymer dispersion, method for its production and its use 52 2001
 
U.S. FILTER/IONPURE, INC. (1)
4,687,561 Process and apparatus for treatment of fluids, particularly demineralization of aqueous solutions 117 1985
 
CHEMFAB CORPORATION (1)
* 5,075,065 Method for manufacturing of cast films at high productivity 61 1989
 
MILLIPORE CORPORATION (3)
5,079,272 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 84 1989
5,211,823 Process for purifying resins utilizing bipolar interface 99 1991
5,158,721 Porous membrane formed from interpenetrating polymer network having hydrophilic surface 73 1991
 
Advanced Cardiovascular Systems, Inc. (1)
6,994,867 Biocompatible carrier containing L-arginine 58 2002
 
Micron Separations, Inc. (1)
5,411,663 Alcohol-insoluble nylon microporous membranes 52 1993
 
JGC CORPORATION (1)
4,540,490 Apparatus for filtration of a suspension 90 1983
 
MILLIPORE INVESTMENT HOLDINGS LIMITED (1)
4,632,745 Electrodeionization apparatus 169 1985
 
Specialty Materials, Inc. (2)
4,384,474 Method and apparatus for testing and using membrane filters in an on site of use housing 81 1981
4,888,115 Cross-flow filtration 73 1983
 
X-FLOW B.V. (1)
5,076,925 Process for preparing a microporous membrane and such a membrane 87 1990
 
MOBIL OIL CORPORATION (2)
5,069,065 Method for measuring wettability of porous rock 81 1991
5,297,420 Apparatus and method for measuring relative permeability and capillary pressure of porous rock 92 1993
 
PALL CORPORATION (11)
4,340,479 Process for preparing hydrophilic polyamide membrane filter media and product 230 1980
4,431,545 Microporous filter system and process 102 1982
4,609,465 Filter cartridge with a connector seal 143 1984
4,702,840 Charge modified polyamide membrane 90 1986
5,417,101 Method and apparatus for testing the integrity of filter elements 88 1992
6,045,899 Highly assymetric, hydrophilic, microfiltration membranes having large pore diameters 128 1996
6,083,393 Hydrophilic membrane 81 1997
6,039,872 Hydrophilic membrane 87 1998
* 6,770,202 Porous membrane 65 2002
6,811,696 Hydrophobic membrane materials for filter venting applications 48 2002
6,884,375 Hydrophobic membrane materials for filter venting applications 61 2004
 
TEIJIN LIMITED (1)
4,388,189 Process for preparation of improved semipermeable composite membranes 87 1980
 
MEMBRANA GMBH (2)
* 4,708,799 Hollow fiber membrane for plasma separation 68 1985
4,968,733 Process for producing microporous powders and membranes 114 1989
 
MOCON, INC. (1)
4,660,411 Apparatus for measuring transmission of volatile substances through films 70 1985
 
PTI Technologies, Inc. (1)
4,812,235 Filter element assembly replaceable mesh pack 74 1983
 
CHAPIN MANUFACTURING, INC. (1)
6,440,303 Fluid filter 68 2001
 
CORNING INCORPORATED (1)
5,275,766 Method for making semi-permeable polymer membranes 55 1992
 
THE DOW CHEMICAL COMPANY (6)
4,656,865 System for analyzing permeation of a gas or vapor through a film or membrane 83 1985
4,797,187 Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups 72 1987
4,904,426 Process for the production of fibers from poly(etheretherketone)-type polymers 57 1988
4,963,304 Process for preparing microporous membranes 64 1988
5,015,275 Isotropic microporous syndiotactic polystyrene membranes and processes for preparing the same 55 1989
5,221,478 Chromatographic separation using ion-exchange resins 61 1992
 
Toyo Boseki Kabushiki Kaisha (1)
4,451,369 Fluid separation apparatus 116 1981
 
FUJIFILM MANUFACTURING EUROPE B.V. (1)
6,890,645 Photocatalytic sheet or film and its manufacturing process 50 2001
 
OSMONICS, INC. (1)
4,846,970 Cross-flow filtration membrane test unit 90 1987
 
EVOQUA WATER TECHNOLOGIES LLC (11)
6,159,373 Cleaning of hollow fibre membranes 61 1997
6,077,435 Filtration monitoring and control system 95 1998
6,156,200 Gas-scrubbed hollow fiber membrane module 108 1998
6,254,773 Microporous membrane filtration assembly 73 1999
6,555,005 Scouring method 84 1999
6,202,475 Predicting logarithmic reduction values 61 1999
D478913 Manifold header 51 2000
D462699 Manifold header cap 58 2000
6,524,481 Apparatus and method for cleaning membrane filtration modules 78 2001
6,641,733 Apparatus and method for cleaning membrane filtration modules 63 2002
6,884,350 Modified membranes 52 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 81 1994
 
D.W. WALKER & ASSOCIATES (1)
5,198,116 Method and apparatus for measuring the fouling potential of membrane system feeds 68 1992
 
MEMCOR, INC., A CORP. OF DE (1)
4,614,109 Method and device for testing the permeability of membrane filters 87 1985
 
DELAWARE PMC-SIERRA, INC. (1)
5,479,590 Anti-aliasing method for polynomial curves using integer arithmetics 65 1994
 
MEDIVATORS INC. (3)
5,543,002 Method of manufacture of hollow fiber filter cartridge with porous ring 66 1994
5,554,283 Hollow fiber filter having a porous collar/ring seal 84 1995
5,531,848 Method of manufacturing of hollow fiber cartridge with porous ring 74 1995
 
Rhone-Poulenc Recherches (1)
4,810,384 Hydrophilic PVDF semipermeable membrane 84 1987
 
ASAHI GLASS COMPANY, LIMITED (1)
4,385,150 Organic solution of fluorinated copolymer having carboxylic acid groups 65 1981
 
PALL FILTRATION AND SEPARATIONS GROUP INC. (1)
6,146,747 Highly porous polyvinylidene difluoride membranes 86 1998
 
UNITED STATES FILTER CORPORATION (1)
4,636,296 Process and apparatus for treatment of fluids, particularly desalinization of aqueous solutions 113 1985
 
SIEMENS WATER TECHNOLOGIES CORP. (4)
5,094,750 Hollow fibre filter cartridge and header 60 1989
5,194,149 Filter cartridge manifold 67 1991
5,405,528 Modular microporous filter assemblies 86 1992
2004/0217,053 Method of cleaning membrane modules 51 2004
 
3M INNOVATIVE PROPERTIES COMPANY (4)
6,096,213 Puncture-resistant polyolefin membranes 78 1998
6,277,512 Polymer electrolyte membranes from mixed dispersions 102 1999
6,423,784 Acid functional fluoropolymer membranes and method of manufacture 68 1999
6,790,912 Extrudable fluoropolymer blends 54 2001
 
LOCTITE CORPORATION (1)
5,135,663 Method of treating (meth)acrylic monomer-containing wastewater 52 1991
 
CELGARD, LLC (1)
* 5,043,113 Process for formation of halogenated polymeric microporous membranes having improved strength properties 49 1990
 
Koch Membrane Systems, Inc. (2)
6,074,718 Self supporting hollow fiber membrane and method of construction 57 1996
6,890,435 Hollow fiber microfiltration membranes and a method of making these membranes 69 2002
 
SIEMENS WATER TECHNOLOGIES HOLDING CORP. (1)
5,104,546 Pyrogens separations by ceramic ultrafiltration 82 1990
 
SCIMAT LIMITED (1)
* 5,198,162 Microporous films 61 1989
 
NEPHROS, INC. (2)
6,315,895 Dual-stage hemodiafiltration cartridge 62 1999
6,635,179 Sterile fluid filtration cartridge and method for using same 58 1999
 
EBARA CORPORATION (2)
4,775,471 Hollow fiber filter device 70 1986
4,876,006 Hollow fiber filter device 122 1988
 
DRM, DR. MUELLER AG (1)
4,511,471 Filter apparatus for continuously thickening suspensions 64 1983
 
Kinetico Incorporated (1)
4,650,586 Fluid treatment system 73 1985
 
UNITED PET GROUP, INC. (1)
5,401,401 Hang on tank canister filter 80 1993
 
Exxon Research and Engineering Company (1)
* 5,396,019 Fluorinated polyolefin membranes for aromatics/saturates separation 62 1993
 
EASTMAN KODAK COMPANY (1)
6,721,529 Release agent donor member having fluorocarbon thermoplastic random copolymer overcoat 73 2001
 
Clack Corporation (1)
5,389,260 Brine seal for tubular filter 89 1993
 
PALL SEITZSCHENK FILTERSYSTEMS GMBH (1)
6,974,554 Potting method 48 2003
 
SIEMENS INDUSTRY, INC. (1)
5,643,455 Concentration of solids in a suspension using hollow fibre membranes 113 1995
 
Japan Organo Co., Ltd (3)
4,886,601 Column filter using bundles of long fibers 69 1989
5,209,852 Process for scrubbing porous hollow fiber membranes in hollow fiber membrane module 108 1991
5,151,191 Filtration process using hollow fiber membrane module 89 1991
 
BASF AKTIENGESELLSCHAFT (1)
6,264,839 Phosphonomethylated polyvinylamines and preparation and use thereof 55 1993
 
USF FILTRATION AND SEPARATIONS GROUP INC. (2)
4,629,563 Asymmetric membranes 276 1981
5,906,742 Microfiltration membranes having high pore density and mixed isotropic and anisotropic structure 96 1997
 
U.S. FILTER WASTEWATER GROUP, INC. (8)
4,931,186 Concentration of solids in a suspension 72 1986
4,767,539 Cleaning of hollow fiber filters utilized in lumenal gas flow 79 1987
4,876,012 Hollow fibre filter cartridge and header 65 1988
5,024,762 Concentration of solids in a suspension 69 1990
2002/0148,767 Membrane filtration manifold system 57 2001
2003/0178,365 Scouring method 57 2003
2003/0226,797 Fibre membrane arrangement 54 2003
2004/0084,369 Scouring method 48 2003
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
Other [Check patent profile for assignment information] (1)
* 2007/0007,197 System and method for synthesizing a polymeric membrane 6 2006
 
GENERAL ELECTRIC COMPANY (4)
8,529,814 Supported hollow fiber membrane 5 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 1 2012
9,227,362 Braid welding 0 2012
 
BL TECHNOLOGIES, INC. (4)
9,132,390 Non-braided reinforced holow fibre membrane 0 2010
9,061,250 Non-braided, textile-reinforced hollow fiber membrane 0 2010
9,221,020 Method to make yarn-reinforced hollow fiber membranes around a soluble core 0 2011
9,321,014 Hollow fiber membrane with compatible reinforcements 0 2011
 
SIEMENS WATER TECHNOLOGIES CORP. (1)
* 2007/0138,090 Method and apparatus for treating wastewater 32 2006
 
SIEMENS WATER TECHNOLOGIES LLC (1)
8,758,622 Simple gas scouring method and apparatus 2 2005
 
EVOQUA WATER TECHNOLOGIES LLC (41)
7,938,966 Backwash method 28 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 1 2005
7,387,723 Filtration apparatus comprising a membrane bioreactor and a treatment vessel for digesting organic materials 39 2005
8,524,794 Hydrophilic membranes 0 2005
7,931,463 Apparatus for potting membranes 26 2005
7,862,719 Square membrane manifold system 32 2005
8,790,515 Reduction of backwash liquid waste 1 2005
8,506,806 Methods and apparatus for removing solids from a membrane module 1 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 31 2006
7,591,950 Submerged cross-flow filtration 33 2006
8,858,796 Assembly for water filtration using a tube manifold to minimise backwash 0 2006
7,563,363 System for treating wastewater 32 2006
* 7,632,439 Poly(ethylene chlorotrifluoroethylene) membranes 34 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 32 2008
8,622,222 Membrane cleaning with pulsed airlift pump 1 2008
7,718,065 Filtration method and apparatus 28 2008
7,718,057 Wastewater treatment system 28 2008
8,512,568 Method of cleaning membrane modules 0 2009
8,382,981 Frame system for membrane filtration modules 4 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 2 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 1 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
9,206,057 Membrane cleaning with pulsed airlift pump 0 2014
8,894,858 Method and assembly for water filtration using a tube manifold to minimize backwash 0 2014
 
KING ABDULAZIZ CITY FOR SCIENCE AND TECHNOLOGY (2)
* 9,233,342 Organic-inorganic porous membrane and a method for preparing the same 0 2013
* 2015/0129,489 ORGANIC-INORGANIC POROUS MEMBRANE AND A METHOD FOR PREPARING THE SAME 0 2013
 
MITSUI MINING & SMELTING CO., LTD. (1)
5,312,614 Method for producing white electrically conductive zinc oxide 3 1990
 
ASAHI GLASS COMPANY, LIMITED (2)
8,952,083 Fluorocopolymer composition and its production process 0 2011
* 2011/0172,336 FLUOROCOPOLYMER COMPOSITION AND ITS PRODUCTION PROCESS 2 2011
* Cited By Examiner

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