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Expired Canadian patentCanada

Aromatic 2-aminoalkyl-1,2-benzoisothiazol-3(2h)one-1, 1-dioxide derivatives

CA 1287351 C · Owner: Merrell Dow Pharmaceuticals Inc. · Inventors: Gittos, Maurice Ward; Hibert, Marcel

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

This invention is directed to a class of aromatic 2-amino-alkyl-1,2-benzoisothiazol-3(2H)one-1,1-dioxide derivatives having the general formula This invention also discloses the process for the preparation for these compounds and discloses their use as anxiolytic and antihypertensive agents.

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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, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2008.
  • 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 4, 1987
GrantedAugust 6, 1991
Term endedAugust 6, 2008
Patent numberCA 1287351 C
Classification (IPC)C07D275/06 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedMarch 4, 1987Patent grantedAug 6, 1991Term endedAug 6, 2008

Sources & verification

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