Expired Canadian patentCanada
Hydrocyanation of butadiene
CA 1304751 C · Owner: Rapoport, Morris · Inventors: Rapoport, Morris
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Open the CIPO recordAbstract From the Canadian patent
TITLE, Hydrocyanation of Butadiene, Abstract Hydrocyanation of butadiene using a mixed ligand zerovalent nickel catalyst wherein the mixture of phosphite ligands there is 10 to 65 mol percent phenyl and a, complemental amount of meta- and para-tolyl.
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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 July 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 5, 1988
GrantedJuly 7, 1992
Term endedJuly 7, 2009
Patent numberCA 1304751 C
Classification (IPC)C07C253/10 +1 more
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.