A process for the production of stable (+) catechin penta acetate useful as a precursor for the production of (+) catechin
CA 2303550 A1 · Owner: Sharma, Ram Prakash · Inventors: Agarwal, Shipra; Mehta, Vijay Kumar; Chattopadhyay, Sunil Kumar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the production of a stable compound (+) catechin penta acetate of formula (2) from T. wallichiana tissue cultures and production of compound (+) catechin of formula (1) said process comprising the steps of inoculation of explants on culture media supplemented with auxins and cytokinins, incubation of the cultures for callus initiation followed by subculturing at 4-6 weeks intervals, extraction of fresh pulverized calli with polar solvents, evaporating the polar solvent to give a residue, treating t:he residue with a chlorinated solvent to isolate (+) catechin by filtration or treating the residue with water and extracting with a chlorinated solvent and …
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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 March 31, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 31, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2022.
- 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
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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.