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Expired Canadian patentCanada

Microbiologically produced d-2-hydroxy-4-methyl- pentanoic acid dehydrogenase, process for producing same, and its use

CA 1210348 A · Owner: Degussa Aktiengesellschaft · Inventors: Hummel, Werner; Leuchtenberger, Wolfgang; Kula, Maria-Regina

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Abstract From the Canadian patent

The present invention relates to the novel enzyme D-2hydroxy-4-methyl pentanoic acid dehydrogenase and its production frcm various micro-organisms available at the Deutsche Sammlung von Mikroorganismen in Gottingen. The novel enzyme can be used for the enzymatic conversion of D-2-hydroxy-4-methyl pentanoic acid and of various other D-2-hydroxy carboxylic acids into the corresponding 2-ketocarboxylic acids and of that of 2-keto-4methyl pentanoic acid and various other 2-ketocarboxylic acids into the corresponding D-2-hydroxy carboxylic acids.

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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.
FiledJune 6, 1984
GrantedAugust 26, 1986
Term endedAugust 26, 2003
Patent numberCA 1210348 A
Classification (IPC)C12N9/04 +2 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedJune 6, 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.