Process for the preparation of perfluoroalkylalkenols
CA 1280445 C · Owner: Poschl, Johanna · Inventors: Poschl, Johanna; Raab, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation of perfluoroalkylalkenols In a novel process for the preparation of perfluoroalkylalkenols, perfluoroalkylhalohydrins are dehydrohalogenated using specific ionic bases, namely using an alkali metal carbonate, an alkali metal hydrogen carbonate or an alkylammonium hydrogen carbonate, in the presence of aprotic and polar solvents, Using this process high yields of, the intended perfluoroalkylalkenols are achieved and only very small amounts, if any at all, of undesired byproducts such as partially fluorinated ether alcohols and/or partially fluorinated epoxides, are formed.
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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 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.