Expired Canadian patentCanada
Antiinflammatory 17, 17-bis(substituted thio) androstenes
CA 1213270 A · Owner: Squibb (E.R.) & Sons, Inc. · Inventors: Varma, Ravi K.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
ANTIINFLAMMATORY 17,17-BIS(SUBSTITUTED THIO) ANDROSTENES, 3-Ketoandrostenes having in the 17-position the substituents R1-S- and R2-S- wherein R1 and R2 are the same or different and each is alkyl, cycloalkyl or aryl, have antiinflammatory activity.
Read the whole patent
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 28, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 19, 1982
GrantedOctober 28, 1986
Term endedOctober 28, 2003
Patent numberCA 1213270 A
Classification (IPC)C07J31/00 +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.