US Patent No: 5,433,861

Number of patents in Portfolio can not be more than 2000

Permanent deformation and use of sulfonated halopolymer articles

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Importance

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Abstract

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This invention relates to the preparation of, and a device for using, a permanently deformed sulfonated halopolymer article. A flexible and non-brittle flange may be formed from at least one end of a hollow perfluorosulfonic acid membrane in one aspect of the invention. The flanged membrane is particularly useful for quick attachment and detachment to various instrumentation used for pervaporation. In addition, by packing the membrane with a means for increasing radial diffusion of fluid within the membrane, pervaporation efficiency may be increased.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
THE DOW CHEMICAL COMPANYMIDLAND, MI755

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Erskine, Steven R Midland, MI 4 1
Frawley, Nile N Midland, MI 4 26

Cited Art Landscape

Patent Info (Count) # Cites Year
 
The Dow Chemical Company (11)
* 4,330,654 Novel polymers having acid functionality 129 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 22,000 215 1980
* 4,470,889 Electrolytic cell having an improved ion exchange membrane and process for operating 45 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
* 4,846,977 Method and device for separating polar from non-polar liquids using membranes 23 1986
* 4,764,320 Method for preparing semipermeable membrane compositions 19 1987
 
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
 
DIONEX CORPORATION (1)
* 4,751,004 Liquid chromatographic method and apparatus with a packed tube membrane device for post-column derivatization/suppression reactions 35 1986
 
ELTECH SYSTEMS LTD. (1)
* 4,465,533 Method for making polymer bonded electrodes 8 1983
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
DOW GLOBAL TECHNOLOGIES INC. (1)
7,419,831 Method and apparatus for determination of water and for normal phase liquid chromatography 0 2002
* Cited By Examiner