Expired Canadian patentCanada
Ethynylation catalyst and process for producing alkynols
CA 1068727 A · Owner: G A F Corporation · Inventors: Hort, Eugene V.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Alkynols such as butynediol and propargyl alcohol are produced from acetylene and an aldehyde such as formaldehyde in the presence of a novel ethynylation catalyst comprlsing a copper acetylide complex on a transitional alumina carrier.
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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 December 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 25, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedDecember 25, 1979
Term endedDecember 25, 1996
Patent numberCA 1068727 A
Classification (IPC)C07C33/04 +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.