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Expired Canadian patentCanada

Heterocyclic compounds and antiulcer agents

CA 1329389 C · Owner: Shionogi & Co. Ltd. · Inventors: Mizushima, Yukio; Matsutani, Shigeru

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

Novel heterocyclic compounds of the formula : or pharmaceutically acceptable acid addition salts thereof having a more potent and longer lasting cytoprotective anti-ulcer action than known analogues, useful in the treatment or prophylaxis of gastric ulcer at an oral dose of 10-500 mg preferably 20 mg-100 mg per day to an adult are provided through, several routes.

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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 10, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 10, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 3, 1989
GrantedMay 10, 1994
Term endedMay 10, 2011
Patent numberCA 1329389 C
Classification (IPC)C07D455/02 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedFeb 3, 1989Patent grantedMay 10, 1994Term endedMay 10, 2011

Sources & verification

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