Aryl pyrimidine derivatives
CA 2255705 A1 · Owner: F. Hoffmann-La Roche Ag · Inventors: Zhao, Shu-Hai; Berger, Jacob; Putman, David George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to pyrimidine derivatives and , pharmaceutically acceptable salts and N-oxides thereof which exhibit useful , pharmacological properties in particular use as selective 5HT2B-antagonists their preparation, pharmaceutical compositions comprising them and their use in the treatment of various diseases, especially migraine. The invention is also directed to formulations and methods for treatment.
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 May 14, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 14, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2019.
- 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.