Process for the resolution of 3-(4-substituted-phenyl)-glycidic acid derivatives
CA 2041305 C · Owner: Zach System S.P.A. · Inventors: Casagrande, Roberto; Giordano, Claudio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the kinetic resolution of cis or trans enantiomeric mixtures of the compounds of formula, (see formula I) wherein R3 and X have the meanings reported in the specification and the asterisks mark the asymmetric carbon atoms is described. The compounds of formula III-A are intermediates useful in the preparation of compounds active on the cardiovascular system.
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 26, 1991 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 26, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.