Canadian application, no grantCanada
Spirocyclic antipsychotic agents
CA 2037467 A1 · Owner: Merck Sharp & Dohme Limited · Inventors: Billington, David C.; Chambers, Mark S.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A class of spirocyclic piperidine derivatives are selective ligands at sigma recognition sites and are therefore useful in the treatment and/or prevention of psychiatric disorders.
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
- Filed March 4, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 4, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 4, 1991
GrantedNo grant recorded
Term endedMarch 4, 2011
Patent numberCA 2037467 A1
Classification (IPC)A61K31/44 +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.