Canadian application, no grantCanada
Process for the resolution of tramadol
CA 2353549 A1 · Owner: Evans, Graham · Inventors: Evans, Graham
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing a substantially single enantiomer of tramadol or a , pharmaceutically-acceptable salt thereof proceeds by means of a classical , salt resolution using a substantially single enantiomer of o,o-di-ptoluoyltartaric acid as a resolving agent.
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 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.
FiledNovember 18, 1999
GrantedNo grant recorded
Term endedNovember 18, 2019
Patent numberCA 2353549 A1
Classification (IPC)C07C213/10 +1 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.