Sulfonated polymer comprising nitrile-type hydrophobic block and solid polymer electrolyte
CA 2579014 C · Owner: Sohma, Hiroshi · Inventors: Kanaoka, Nagayuki; Sohma, Hiroshi; Iguchi, Masaru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A membrane-electrode assembly for a solid polymer electrolyte fuel cell exhibiting excellent hot water and oxidation resistance, low temperature size stability and excellent power generation performance even in a low temperature environment. The membrane-electrode assembly comprises a polymer electrolyte membrane composed of a sulfonated polyarylene polymer having a recurring unit of the formula (1): , (see formula 1) , and a recurring unit of the formula (2): (see formula 2) , Q is represented by the formula (3): (see formula 3) , Y and A each independently represent a divalent atom or organic group, or a direct bond; Ar represents an aromatic group; B independently represents O …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 1, 2004 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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