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Expired Canadian patentCanada

Antimycotic external imidazole preparations

CA 2035758 C · Owner: Asaoka, Takemitsu · Inventors: Murata, Yataka; Imamori, Katsumi; Narui, Takashi

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

Antimycotic external imidazole preparations are disclosed. They contain the following ingredients: (a) 0.1-5 wt.% of (E)-1-2-methylthio-1-2 (pentyloxy)phenylethenyl-1H-imidazole hydrochloride; (b) 0.01-3 wt.% of a basic substance; and (c) an external preparation base.

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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 February 5, 1991 and granted April 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2011.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2013.
  • 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 5, 1991
GrantedApril 2, 2002
Term endedFebruary 5, 2011
Patent numberCA 2035758 C
Classification (IPC)A61K31/41 +2 more

Timeline

Timeline From CIPO dates

1992199419961998200020022004200620082010Application filedFeb 5, 1991Patent grantedApril 2, 2002Term endedFeb 5, 2011

Sources & verification

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