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Expired Canadian patentCanada

Basically substituted 3,4-dihydro-2h-isoquinolin-1-thiones and process for preparing them

CA 1055027 A · Owner: Hoechst Aktiengesellschaft · Inventors: Kunstmann, Rudolf; Kaiser, Joachim

CIPO record

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Abstract From the Canadian patent

this invention relates to 3,4-aihydro-2H-isoquinolinel-ones of the formula, (X), wherein X1 represents hydrogen a saturated or unsaturated, sraight-chained or branched alkyl radical having 1 to 6 carbon atoms or the phenyl radical, R2 represents a dialkylaminoalkyl radical of the formula, wherein A represents a straight-chained or branched low molecular alkylene group and R5 and R6 are identical or different and represent straight-chained or branched low molecular alkyl, radicals and may form together with the nitrogen atom a 5- 6-, or 7-membered ring, wherein one of the hydrocarbons is substituted by a hetero atom which may be substituted with hydrogen C1-C4 -, alkyl or the phenyl radical, …

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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 May 22, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedMay 22, 1979
Term endedMay 22, 1996
Patent numberCA 1055027 A
Classification (IPC)C07D401/06 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedMay 22, 1979Term endedMay 22, 1996

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