Antioxidant oleoresin compositions and a process for their production
CA 2119265 C · Owner: Moser, Daniel G. · Inventors: Frakman, Grigory; Moser, Daniel G.; Evans, David A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Herbal materials containing carnosic acid or herbal extracts containing carnosic acid are mixed with preferably a 40 % - 95 x by weight solution of methanol or ethanol in water. The solution is separated fron the insolubles and recovered and adjusted to an alcohol content of less than 40 % in the case of ethanol or 60 % in the case of methanol by either removal of the alcohol or by addition of water causing the precipitation of the oleoresin which is separated from the solution and recovered. The recovered oleoresin may be dried and has an enhanced content of carnosic acid as compared to the original herbal material or herbal extract is, substantially free of green coloration 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 September 16, 1992 and granted March 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2014.
- 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.