US Patent No: 4,731,263

Number of patents in Portfolio can not be more than 2000

Method for the preparation of ionomer films

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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The invention is a method for forming a perfluorosulfonate ionomer film comprising: (a) forming a solution of a perfluorosulfonate ionomer in its salt form; (b) coating a substrate with the perfluorosulfonate ionomer solution; and (c) heating the coated substrate to a temperature of at least about 120.degree. C. for sufficient time to deposit a solvent-resistant film of a perfluorosulfonate ionomer onto the substrate.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE DOW CHEMICAL COMPANYMIDLAND, MI6252

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Martin, Charles R Gainesville, FL 33 148
Moore, III Robert B College Station, TX 1 20

Cited Art Landscape

Patent Info (Count) # Cites Year
 
The Dow Chemical Company (9)
4,330,654 Novel polymers having acid functionality 124 1980
4,337,137 Composite ion exchange membranes 41 1980
4,337,211 Fluorocarbon ethers having substituted halogen site(s) and process to prepare 44 1980
4,358,412 Preparation of vinyl ethers 50 1980
4,358,545 Sulfonic acid electrolytic cell having flourinated polymer membrane with hydration product less than 22,000 199 1980
4,470,889 Electrolytic cell having an improved ion exchange membrane and process for operating 44 1980
4,417,969 Sulfonic acid electrolytic cell membranes 67 1982
4,462,877 Composite ion exchange membranes 23 1982
4,478,695 Sulfonic acid electrolytic cell membranes and use thereof in the electrolysis of sodium chloride 40 1983
 
ASAHI GLASS COMPANY, LIMITED (5)
4,212,713 Electrolysis of aqueous solution of alkali metal chloride 28 1978
4,209,635 Process for producing perfluorinated vinyl ether having ester group 33 1979
4,251,333 Electrolysis of aqueous solution of alkali metal chloride 27 1979
4,270,996 Cation exchange membrane of fluorinated polymer for electrolysis and electrolysis using the membrane 24 1979
4,340,680 Cation exchange membrane of fluorinated polymer for an electrolysis 28 1980
 
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA (2)
4,329,435 Novel fluorinated copolymer with tridihydro fluorosulfonyl fluoride pendant groups and preparation thereof 50 1980
4,357,218 Cation exchange membrane and use thereof in the electrolysis of sodium chloride 34 1980
 
E. I. DU PONT DE NEMOURS AND COMPANY (2)
4,433,082 Process for making liquid composition of perfluorinated ion exchange polymer, and product thereof 154 1981
4,453,991 Process for making articles coated with a liquid composition of perfluorinated ion exchange resin 58 1982
 
ELTECH SYSTEMS CORPORATION (2)
4,192,725 Electrolytic production of high purity alkali metal hydroxide 35 1977
4,434,116 Method for making a porous fluorinated polymer structure 13 1981
 
The United States of America as represented by the Secretary of the Interior (1)
4,277,344 Interfacially synthesized reverse osmosis membrane 161 1979

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
E. I. DU PONT DE NEMOURS AND COMPANY (8)
5,447,636 Method for making reinforced ion exchange membranes 31 1993
6,150,426 Compositions containing particles of highly fluorinated ion exchange polymer 60 1997
6,552,093 Compositions containing particles of highly fluorinated ion exchange polymer 11 2000
6,916,853 Compositions containing particles of highly fluorinated ion exchange polymer 1 2002
7,166,685 Compositions containing particles of highly fluorinated ion exchange polymer 7 2005
8,058,319 Process to prepare fluoropolymer dispersions and membranes 0 2007
7,714,028 Compositions containing particles of highly fluorinated ion exchange polymer 0 2008
7,893,118 Compositions containing particles of highly fluorinated ion exchange polymer 0 2010
 
The Dow Chemical Company (6)
5,124,080 Electrochromic device 8 1991
5,746,954 Processes for forming thin, durable coatings of perfluorocarbon ionomers on various substrate materials 12 1995
5,718,947 Processes for forming thin, durable coatings of cation-containing polymers on selected substrates 26 1995
5,716,680 Solventless process for forming thin, durable coatings of perfluorocarbon ionomers on various polymeric materials 3 1996
5,863,610 Process for depositing a fluorocarbonsulfonic ionomer on a support and articles prepared therewith 4 1996
5,993,907 Processes for forming thin, durable coatings of perfluorocarbon ionomers on various substrate materials 5 1997
 
BASF CORPORATION (1)
8,124,261 Process for recycling components of a PEM fuel cell membrane electrode assembly 0 2006
 
CONOCOPHILLIPS COMPANY (1)
5,191,151 Use of silver-exchanged ionomer membranes for gas separation 12 1991
 
DIONEX CORPORATION (1)
5,358,612 Electrophoresis with chemically suppressed detection 23 1991
 
GM GLOBAL TECHNOLOGY OPERATIONS LLC (1)
6,074,692 Method of making MEA for PEM/SPE fuel cell 34 1998
 
STMICROELECTRONICS (ROUSSET) SAS (1)
8,323,733 Method for producing a membrane comprising micropassages made from porous material by chemical mechanical polishing 0 2009
 
W. L. GORE & ASSOCIATES, INC. (1)
7,931,995 Solid electrolyte composite for electrochemical reaction apparatus 0 2003