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Expired Canadian patentCanada

Methods of preventing and reducing the size of striae distensae lesions

CA 2065412 C · Owner: Kligman, Albert M. · Inventors: Kligman, Albert M.

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

Striae distensae lesions may be prevented and/or reduced in size by topically applying to the skin affected with the lesions an effective amount of a retinoid; preferably retinoic acid; preferably by daily application in a dermatologically acceptable vehicle, such as a cream base, at a concentration of about 0.025 to 0.1 weight percent retinoic acid. When applied during the striae rubrae stage, the retinoid maybe effective to prevent the formation of striae albae lesions, and when applied in either stage the , retinoid may be effective to reduce the width and depth of the lesions with , improved texture and softness.

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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 August 30, 1990 and granted May 8, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 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.
FiledAugust 30, 1990
GrantedMay 8, 2001
Term endedAugust 30, 2010
Patent numberCA 2065412 C
Classification (IPC)A61K31/20 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedAug 30, 1990Patent grantedMay 8, 2001Term endedAug 30, 2010

Sources & verification

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