Expired Canadian patentCanada
Process for the optical resolution of a racemic acid
CA 1338034 C · Owner: Piselli, Fulvio L. · Inventors: Piselli, Fulvio L.
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the optical resolution of 2-hydroxy-3- (4-methoxyphenyl)-3-(2-acetylaminophenylthio)-propionic acid sodium salt by seeding of a supersaturated solution of said salt with one of the enantiomers.
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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
- Granted February 6, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 2013.
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FiledJanuary 26, 1989
GrantedFebruary 6, 1996
Term endedFebruary 6, 2013
Patent numberCA 1338034 C
Classification (IPC)C07C319/28 +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.