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Expired Canadian patentCanada

Process for the preparation of tertiary carbinols containing an aminic substituent

CA 1340055 C · Owner: Gruppo Lepetit S.P.A. · Inventors: Bellasio, Elvio

CIPO record

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Abstract From the Canadian patent

A process for the preparation of tertiary diphenyl carbinols containing a primary or secondary amine substituent on the aliphatic moiety attached to the carbinol function which consists in contacting a Grignard phenyl reagent with an amino-acid wherein the mobile protons are not masked in an aprotic inert organic solvent or a mixture thereof at a temperature between 20°C and the boiling temperature by the reaction mixture. The reaction products are useful as active ingredients of medicaments and intermediates for the manufacture thereof.

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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 September 22, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 2015.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 1, 1989
GrantedSeptember 22, 1998
Term endedSeptember 22, 2015
Patent numberCA 1340055 C
Classification (IPC)C07D211/22

Timeline

Timeline From CIPO dates

199019931996199920022005200820112014Application filedMarch 1, 1989Patent grantedSep 22, 1998Term endedSep 22, 2015

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