Expired Canadian patentCanada
3,20-DIKETOPREGNENES HAVING AN 11.beta.-ACETAL GROUP AND DERIVATIVES THEREOF
CA 1058161 A · Owner: E.R. Squibb And Sons · Inventors: Varma, Ravi K.; Cimarusti, Christopher M.
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
3,20-Diketopregnenes having in tho 110-position a group of the formula, wherein R1 is alkyl and R2 is hydrogen alkyl, alkoxy, or, halogen, and having a cyclic 16,17-acetal or metal group have useful anti-inflummatory activity.
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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 10, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 10, 1996.
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Filed—
GrantedJuly 10, 1979
Term endedJuly 10, 1996
Patent numberCA 1058161 A
Classification (IPC)C07J71/00
Timeline
Timeline From CIPO dates
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.