3-(5-tetrazolyl-benzyl)amino-piperidine derivatives and antagonists of tachykinins
CA 2172529 A1 · Owner: Naylor, Alan · Inventors: Armour, Duncan Robert; Evans, Brian; Pegg, Neil Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to piperidine derivatives of formula (1), wherein R1 is a C1-4alkoxy group; R2 is formula (a); R3 is a hydrogen or halogen atom; R4 and R5 may each independently represent a hydrogen or halogen atom or a C1. 4alkyl, C1-4alkoxy or trifluoromethyl group; R6 is a hydrogen atom, a C1-4alkyl, (CH2)mcyclopropyl, S(O)nC1-4alkyl phenyl, NR7R8, CH2C(O)CF3 or trifluoromethyl group; R7 and R8 may each independently represent a hydrogen atom. or a C1-4alkyl or acyl group; x represents zero or 1; n represents zero 1 or 2; m, represents zero or 1; and pharmaceutically acceptable salts and solvates thereof; to processes for their preparation; and their use in the treatment of …
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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 20, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 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.
Timeline
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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.