Canadian application, no grantCanada
Pharmaceutical formulations of sildenafil
CA 2272042 A1 · Owner: Pfizer Limited · Inventors: Dolan, Thomas Francis; Bell-Huff, Cristi; Hausberger, Angela Carol Gatlin
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pharmaceutical formulations of the compound sildenafil.
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 13, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 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.
FiledMay 13, 1999
GrantedNo grant recorded
Term endedMay 13, 2019
Patent numberCA 2272042 A1
Classification (IPC)A61K31/50 +2 more
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.