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Expired Canadian patentCanada

New 1,7-annelated 1h-indole-2-carboxylic acid-n-(1,4-benzodiazepin-3-yl) amides

CA 2011658 C · Owner: Solvay Pharmaceuticals Gmbh · Inventors: Waldeck, Harald; Hamminga, Derk; Van Wijngaarden, Ineke

CIPO record

Overview

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Abstract From the Canadian patent

Compounds corresponding to the formula I (see above formula), in which, R1 represents hydrogen lower alkyl or cycloalkylalkyl, with 4-7 carbon atoms R2 represents hydrogen, halogen, lower alkyl lower alkoxy, or trifluoromethyl, and, R3 represents hydrogen halogen, lower alkyl or lower, alkoxy, or R2 and R3 together denote an alkylenedioxy group R4 represents cycloalkyl with 5 to 6 carbon atoms thiophene or optionally substituted phenyl R5 represents hydrogen or halogen, R6 represents hydrogen halogen, lower alkyl, lower alkoxy, or trifluoromethyl and, Z represents an alkylene chain with 2-4 carbon atoms which can optionally be mono- or disubstituted by lower alkyl or onto which a …

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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

  • Filed March 7, 1990 and granted May 16, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 7, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2012.
  • 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 7, 1990
GrantedMay 16, 2000
Term endedMarch 7, 2010
Patent numberCA 2011658 C
Classification (IPC)C07D471/06 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedMarch 7, 1990Patent grantedMay 16, 2000Term endedMarch 7, 2010

Sources & verification

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