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Expired Canadian patentCanada

Process for the preparation of n-alkylated amino acids and their esters, use in the synthesis of carboxyalkyl dipeptides

CA 1341380 C · Owner: Remond, Georges · Inventors: Baliarda, Jean; Remond, Georges; Marchand, Bernard

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Abstract From the Canadian patent

Industrial synthesis process for the derivative of formula (I): (See formula I) and their addition salts to a mineral or organic acid or base in which: R1 is a linear or branched lower alkyl (from 1 to 6 carbon atoms) R2 is hydrogen or a linear or branched lower alkyl (from 1 to 4 carbon atoms). Application to industrial synthesis of carboxyalykl dipeptides.",

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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 6, 2002. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 7, 1988
GrantedAugust 6, 2002
Term endedAugust 6, 2019
Patent numberCA 1341380 C
Classification (IPC)C07D217/02 +2 more

Timeline

Timeline From CIPO dates

19891993199720012005200920132017Application filedSep 7, 1988Patent grantedAug 6, 2002Term endedAug 6, 2019

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