Canadian application, no grantCanada
Synthesis of methylthiophenyl hydroxyketones
CA 2347768 A1 · Owner: Chen, Cheng Y. · Inventors: Wang, Xin; Chen, Cheng Y.; Tillyer, Richard D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention encompasses a novel process for synthesizing compounds represented by formula (A). These compounds are intermediates useful in the preparation of certain agents that are selective COX-2 inhibitors.
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 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.
FiledOctober 25, 1999
GrantedNo grant recorded
Term endedOctober 25, 2019
Patent numberCA 2347768 A1
Classification (IPC)C07C319/14 +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.