Process for preparing o-acetylserine, l-cysteine and l-cysteine-related products
CA 2235752 C · Owner: Consortium Fuer Elektrochemische Industrie Gmbh · Inventors: Heinrich, Peter; Leinfelder, Walfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns processes for preparing O-acetylserine L-cysteine and , sulphurous compounds derived therefrom using feedback-resistant serine acetyl transferases. In comparison with the wild-type enzyme these serine acetyl , transferases have reduced sensitivity to the inhibitor L-cysteine and a protein sequence which, in comparision with the wild-type enzyme displays at , least one mutation or deletion. The processes are characterized in that the mutation lies in the sequence region of the amino acid in position 97 up to and including the amino acid in position 273 or the deletion lies in the carboxy terminal sequence region as from the amino acid in position 227 position 1 …
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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 October 24, 1996 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 24, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 24, 2018.
- 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.