Method for producing optically active compound
CA 2633357 A1 · Owner: Kyowa Hakko Kogyo Co. Ltd. · Inventors: Hashimoto, Shin-Ichi; Katsumata, Ryoichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a method for industrially advantageously producing (S)-4-hydroxy-2--ketoglutaric acid and for producing compounds which are formed by biosynthesis from the precursor (S)-4-hydroxy-2--ketoglutaric acid, for example, for producing the compounds (2S,4S)-4-hydroxy-L-glutamic acid and (2S,4S)-4-hydroxy-L--proline using a recombinant microorganism carrying a recombinant DNA harboring the DNA fragment encoding 4(S)-4--hydroxy-2-ketoglutaric acid aldolase gene.
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 June 4, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2020.
- 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.