Expired Canadian patentCanada
3-azetidinylalkylpiperidines or -pyrrolidines as tachykinin antagonists
CA 2237189 C · Owner: Middleton, Donald Stuart · Inventors: Middleton, Donald Stuart; Marchington, Allan Patrick; Mackenzie, Alexander Roderick
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 provides compounds of formula (I) and the pharmaceutically acceptable salts thereof. Such compounds and salts are tachykinin antogonists.
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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 December 9, 1996 and granted September 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1996
GrantedSeptember 3, 2002
Term endedDecember 9, 2016
Patent numberCA 2237189 C
Classification (IPC)C07D401/06 +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.