Cation exchange membrane preparation and use thereof
Patent 4151053 Issued on April 24, 1979. Estimated Expiration Date: 
March 17, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 17, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3301893 3674587 3784399 3887499 Heat-treated fluorocarbon sulfonylamine cation permselectivity Process for producing alkali metal hydroxide Patent #: 4065366 Inventors
AssigneeApplicationNo. 05/887761 filed on 03/17/1978US Classes:205/521, Multilayered membrane204/252, Diaphragm type204/296, Organic521/29Polymer characterized by defined size or shape other than bead or pearlExaminersPrimary: Sebastian, Leland A.Attorney, Agent or FirmInternational ClassesC25B 1/00 (20060101)C25B 1/46 (20060101) C08J 5/20 (20060101) C08J 7/12 (20060101) C08J 7/00 (20060101) C08J 5/22 (20060101) Foreign Application Priority Data1975-07-09 JPAbstractCation exchange membrane comprising a fluorocarbon polymer characterized by the presence of pendant carboxylic acid groups of the formula -- OCF2 COOH -- and derivatives thereof. |
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