Method for producing perfluoroether oligomers having terminal carboxylic acid groups
CA 1069929 A · Owner: Lagow, Richard J. · Inventors: Lagow, Richard J.; Inoue, Shoji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for producing perfluoroether oligomers having terminal carboxylic acid groups. In this method a polyether, such as polyethylene oxide having a molecular weight, higher than the product to be produced is fluorinated in a direct fluorination apparatus. The polyether is fragmented during fluorination and significant yields of the desired oligomer are obtained.
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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 January 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.