Carbonylation process using palladium phosphine catalyst
CA 2093470 C · Owner: Kremers, Antoon Paul Michael · Inventors: Arnoldy, Peter; Kremers, Antoon Paul Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the carbonylation of an olefinically or acetylenically unsaturated hydrocarbon compound by reaction with carbon monoxide and a hydroxy compound in the presence of a catalyst system comprising a source of cationic palladium, a source of phosphine and a protonic acid which reaction is, carried out in the presence of a free radical inhibitor. (tot
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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 April 6, 1993 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2015.
- 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.