Canadian application, no grantCanada
Synthesis of 4-(piperidyl) (2-pyridyl)methanone-(e)-o-methyloxime and its salts
CA 2463510 A1 · Owner: Wu, Wenxue · Inventors: Tsai, David J. S.; Liao, Hongbiao; Wu, Wenxue
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In one embodiment, the present invention describes the synthesis of 4- (piperidyl) (2-pyridyl)methanone-(E)-O-methyloxime dihydrochloride monohydrochloride and free base, and similar compounds in high stereochemical , purity.
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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 October 15, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 15, 2002
GrantedNo grant recorded
Term endedOctober 15, 2022
Patent numberCA 2463510 A1
Classification (IPC)C07D401/06
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.