Process for the preparation of primary and secondary fluorine-containing alcohols
CA 2074619 A1 · Owner: Hoechst Aktiengesellschaft · Inventors: Knaup, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure Process for the preparation of primary and secondary fluorine-containing alcohols, A process is described for the preparation of fluoroalcohols of the formula below, Rf-CH2-CH2-?H-OH in which Rf is a perfluoroalkyl radical having 1 to 20 carbon atoms and R is hydrogen or an alkyl radical having 1 to 5 carbon atoms, by reaction of a perfluoroalkylethylene, Rf-CH=CH2, and an n-C1 to C6-alkanol in the presence of a free radical initiator, the perfluoroalkylethylene, the alkanol and the free radical initiator being used in the molar ratio of 1 to 20-50 to 0.002-0.2. In the novel process in addition, the reaction is, carried out in a specific manner and under specific …
Read the whole patent
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 July 24, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2014.
- 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.