Pyridine and pyridine n-oxide derivatives of diaryl methyl piperidines or piperazines, and compositions and methods of use thereof
CA 2093798 C · Owner: Piwinski, John J. · Inventors: Friary, Richard; Piwinski, John J.; Seidl, Vera
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pyridine and pyridine N-oxide derivatives of diaryl methyl piperidines or piperazines represented by structural formula (1.0) and pharmaceutically acceptable salts thereof are disclosed which , possess anti-allergic and anti-inflammatory activity. Pharmaceutical compositions containing and methods of using the compounds are also described.
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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 8, 1991 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 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.
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.