Method and immobilized biocatalyst for the production of l(-) malic acid
CA 2265250 A1 · Owner: Polyak, Bela · Inventors: Hansel, Miklos; Benjamin, Arpad; Dorgai, Laszlo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein is a novel continuous production process for the preparation of L(-) malic acid (the naturally occurring enantiomer of malic acid) from fumaric acid with the use of a novel immobilized biocatalyst. The long shelf life novel immobilized biocatalyst comprising living or killed cells or purified enzymes suitable for use in the method of the invention is also comprised in the invention.
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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 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 5, 2019.
- 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.