Heterocycles
CA 2285120 A1 · Owner: Pfizer Limited · Inventors: Fox, David Nathan Abraham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a compound of the formula:or a pharmaceutically acceptable acid addition salt thereof wherein, Ar is phenyl substituted by 1 or 2 substituent(s) each independently selected from fluoro and chloro;, X is NSO2(C1-C4 alkyl) NSO2(halo(C1-C4 alkyl)) or O;, m is 0 or 1; n is 1 or 2;, p is 1 or 2;, q is 1 or 2; and r is 1 or 2, together with processes for the preparation of intermediates , used in, the preparation of compositions containing and uses of, such derivatives. The compounds have tachykinin receptor antagonist activity.
Read the whole patent
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 6, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2021.
- 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.