A method for resolving optical isomers
CA 2276901 A1 · Owner: Okamoto, Atsushi · Inventors: Kitagawa, Tetsuji; Shibayama, Katsuhiro; Yamakawa, Shinobu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the present invent:ion is to provide a method for efficiently resolving optical isomers. The object of the present invention can be achieved by a method for resolving optical isomers, in which an discriminating liquid consisting of an discriminating agent capable of discriminating optical isomers and a diluent is brought into contact with a mixture containing said optical isomers in counter current to resolve the, optical isomers by adsorption separation distillation separation, absorption separation or membrane separation and is recovered at, an optical isomer content of 5 wt% or less for recycled use characterized by satisfying one or move of the following conditions (a) The …
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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
- Filed July 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2021.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.