Fluorinated ion exchange polymer containing carboxylic groups, and process for making same
CA 1162565 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Resnick, Paul R.; Molnar, Charles J.; Grot, Walther G.
Overview
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Fluorinated ion exchange polymers which have both pendant side chains containing carboxylic groups and pendant side chains which contain sulfonyl groups when used in the, form of membranes to separate the anode and cathode compartments of an electrolysis cell, permit operation at high current efficiency. They are made by oxidation of fluorinated polymers which have pendant side chains containing sulfinic groups, or both sulfinic and sulfonyl groups. The fluorinated polymers which have pendant side chains containing sulfinic groups, or both sulfinic and sulfonyl groups are in turn made, from fluorinated polymers which have pendant side chains containing sulfonyl halide groups by reduction …
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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
- Granted February 21, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 21, 2001.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.