Heterocyclic substituted piperazinone derivatives as tachykinin receptor antagonists
CA 2215333 C · Owner: Burkholder, Timothy P. · Inventors: Kudlacz, Elizabeth M.; Le, Tieu-Binh; Burkholder, Timothy P.
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 substituted piperazinone derivatives of formula (1), stereoisomers, or pharmaceutically acceptable salts thereof and their use as tachykinin receptor antagonists. Such antagonists are useful in the treatment of tachykinin-mediated diseases and conditions disclosed herein including: asthma, cough, and bronchitis. The present invention also relates to intermediates useful in the preparation of compounds of formula (1).
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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 February 6, 1996 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 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.
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.