Pyrazolopyrimidine and pyrazolopyridine compounds having crf antagonist activity
CA 2272138 C · Owner: Pfizer Limited · Inventors: Faraci, William S.; Welch, Willard M. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are compounds of the formula: (wherein A and R1 together with the carbons to which they are attached form pyrimidinyl or 5-pyridyl each being optionally, substituted; R2 is a hydrogen or a substituent; R3 is a cyclic group such as substituted phenyl; and R4 is a cyclic group such as optionally substituted phenyl) having corticotropinreleasing factor (CRF) antagonist activity and useful for treating diseases induced by CRF.
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 November 3, 1993 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2015.
- 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.