Canadian application, no grantCanada
Process for simvastatin
CA 2067722 A1 · Owner: Dabora, Rebecca L. · Inventors: Tewalt, Gregory L.; Dabora, Rebecca L.
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 is disclosed, for the formation of simvastatin, which comprises the sequential acylation of a diol lactone to form a bis acylated intermediate followed by selective deacylation and lactone ring closure to form simvastatin.
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 April 30, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 30, 1992
GrantedNo grant recorded
Term endedApril 30, 2012
Patent numberCA 2067722 A1
Classification (IPC)C07C69/73 +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.