Transvinylation process for the preparation of thermally labile vinyl compounds and vinyl compounds prepared from thermally labile acids
CA 2064376 A1 · Owner: Union Carbide Chemicals And Plastics Company · Inventors: Murray, Rex E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Transvinylation Process for The Preparation of Thermally Labile Vinyl Compounds and for Vinyl Compounds Prepared from, Thermally Labile Acids Abstract, There is described an improved process for the preparation of thermally labile vinyl compounds and for the preparation of vinyl compounds from thermally labile Bronsted acids which comprises reacting a vinyl derivative of a first Bronsted acid with a thermally labile Bronsted acid in the presence of a ruthenium compound at a temperature at which transvinylation occurs and recovering as a product of transvinylation the vinyl derivative of the thermally labile acid. The vinyl product derivative itself may, or may not, be thermally labile …
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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 March 27, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2014.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.