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Expired Canadian patentCanada

PROCESS FOR THE CONTINUOUS ENZYMATIC CONVERSION OF .alpha.-HYDROXY-CARBOXYLIC ACIDS INTO CORRESPONDING OPTICALLY ACTIVE .alpha.-AMINO-CARBOXYLIC ACIDS

CA 1210354 A · Owner: Gesellschaft Fur Biotechnologische Forschung Mit Beschrankter Haftung (Gbf) · Inventors: Leuchtenberger, Wolfgang; Kula, Maria-Regina; Wandrey, Christian

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

alpha.-hydroxy-carboxylic acids are continuously converted into corresponding optically active .alpha.-amino-carboxylic acids. The conversion takes place in a diaphragm reactor in the presence of nicotine-amide-adenine dinucleotide increased in the molecular weight by bonding to a water-soluble high-molecular substance a, dehydrogenase specific for the reactant .alpha.-hydroxy-carboxylic acid a dehydrogenase specific for the product .alpha.-amino-carboxylic acid and ammonium ions. An aqueous solution of the reactant .alpha.-hydroxycarboxylic acid and of the corresponding .alpha.-ketocarboxylic acid in a substantially lower amount and an amount of ammonium ions which is at least equimolar to …

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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

  • Granted August 26, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 29, 1984
GrantedAugust 26, 1986
Term endedAugust 26, 2003
Patent numberCA 1210354 A
Classification (IPC)C12P13/04 +2 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedFeb 29, 1984Patent grantedAug 26, 1986Term endedAug 26, 2003

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.