4-phenyl-pyridine derivatives as neurokinin-1 receptor antagonists
CA 2416874 C · Owner: Schnider, Patrick · Inventors: Stadler, Heinz; Hoffmann, Torsten; Schnider, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to compounds of general formulas (IA) or (IB) wherein R1 is (a), (b), (c), (d) or is -NH(CH2)2OH -NR3C(O)CH3 or -NR3C(O)-cyclopropyl; , R2 is methyl or chloro; R3 is hydrogen or methyl; R is hydrogen or -(CH2)2OH; and n is 1 or 2 and pharmaceutically acceptable acid addition salts thereof. These compounds have a good affinity of the NK-1 receptor and therefore they may be used in the treatment or prevention of diseases related to this , receptor.
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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 July 20, 2001 and granted January 18, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2023.
- 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.