A process for preparing optically active mevalonolactone compounds
CA 2183071 C · Owner: Ohara, Yoshio · Inventors: Ikeda, Hirokazu; Ohara, Yoshio; Matsumoto, Hiroo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The process for preparing mevalonolactone compounds is carried out by means of batch system chromatography or a simulated moving bed chromatographic process using columns filled with an optical resolution filler comprising a polysaccharide derivative. The simulated moving bed chromatographic process comprises forming a circulation flow circuit comprising a plurality of columns endlessly connected in series; enforcing a fluid to flow through the circuit in one direction; providing the column series alternately with an inlet port through which the fluid is introduced into the column in the flow direction and with an outlet port through which the fluid is taken out; intermittently shifting …
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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 February 22, 1995 and granted December 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 22, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 22, 2017.
- 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.