Method of producing l-serine by fermentation
CA 2256757 C · Owner: Sugimoto, Masakazu · Inventors: Suga, Mikiko; Osumi, Tsuyoshi; Sugimoto, Masakazu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a coryneform bacterium having resistance to azaserine or .beta.-(2-thienyl)-DL-alanine and having L-serine productivity. Also disclosed , are D-3-phosphoglycerate dehydrogenase derived from a coryneform bacterium, in which feedback inhibition by L-serine is desensitized; the D-3-phosphoglycerate dehydrogenase, which is obtainable from a coryneform bacterium having resistance to azaserine or .beta.-(2- thienyl)-DL-alanine and having L-serine productivity; the D-3-phosphoglycerate dehydrogenase having an amino acid sequence depicted in SEQ ID NO : 12 in Sequence Listing or the sequence including substitution, addition or deletion of one or more amino acids, wherein an …
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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 January 11, 1999 and granted May 28, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 2021.
- 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.