Expired Canadian patentCanada
3.alpha.-PHOSPHATO 11-OXO 20,20-BIS HYDROXYMETHYL 21 HYDROXY 5.beta.-PREGNANE ET SES ESTERS
CA 743943 A · Owner: Roussel-Uclaf S.A. · Inventors: Lucien Nedelec; Daniel Bertin
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
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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 October 4, 1966. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 4, 1983.
- 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—
GrantedOctober 4, 1966
Term endedOctober 4, 1983
Patent numberCA 743943 A
Classification (IPC)C07J43/00 +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.