Biocatalytic process for the production of l-(-)-carnitine from crotonobetaine and strains of proteeae for use in said process
CA 2042425 C · Owner: Sih, Charles J. · Inventors: Sih, Charles J.; Shapiro, Stuart; Bernardini, Manrico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for stereospecifically hydrating crotonobetaine to L-(-)-carnitine via the action of an enzyme produced by four new strains of Proteus mirabilis (NRRL B-18480, NRRL B-18481 NRRL B-18482, and, NRRL B-18483) in biotransformation media containing from 10 to 12% (w/v) crotonobetaine inner salt.
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 May 13, 1991 and granted July 11, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 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.