Expired Canadian patentCanada
DI-EPOXIDE PROCESS FOR THE PREPARATION OF 9.alpha.-FLUORO-16-METHYLENE-PREDNISOLONE OR -PREDNISONE, AND 21 ESTERS THEREOF
CA 908159 A · Owner: Merck-Anlagen-Gesellschaft Mit Beschrankter Haftung · Inventors: Dieter Orth; Klaus Irmscher
Overview
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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 August 22, 1972. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 22, 1989.
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Filed—
GrantedAugust 22, 1972
Term endedAugust 22, 1989
Patent numberCA 908159 A
Classification (IPC)C07J7/00
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.