Expired Canadian patentCanada
.delta.16 unsaturated c17 heterocyclic steroids useful as steroid c17-20 lyase inhibitors
CA 2332652 C · Owner: Merrell Pharmaceuticals Inc. · Inventors: Burkhart, Joseph P.; Peet, Norton P.; Gates, Cynthia P.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to .DELTA.16 unsaturated C17 heterocyclic steroids which are useful as steroid C17-20 lyase inhibitors. ,
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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
- Filed September 29, 1994 and granted June 3, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2016.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 29, 1994
GrantedJune 3, 2003
Term endedSeptember 29, 2014
Patent numberCA 2332652 C
Classification (IPC)C07J43/00 +2 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.