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Expired Canadian patentCanada

Method for preventing or alleviating skin irritation by formulations containing superoxide dismutase

CA 1265053 C · Owner: Centerchem, Inc.("Centerchem") · Inventors: Wilder, Martin S.

CIPO record

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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 discloses use of superoxide dismutase (SOD) as an agent for the protection of the skin against inflammatory reactions associated with chemical irritation and acne. Topical application of SOD in a formulation attenuates dermal injury associated with the induction of reactive oxygen species by a wide variety of chemical irritants associated, with inflammation, and associated with acne.

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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 January 30, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 29, 1985
GrantedJanuary 30, 1990
Term endedJanuary 30, 2007
Patent numberCA 1265053 C
Classification (IPC)A61K38/44 +1 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedOct 29, 1985Patent grantedJan 30, 1990Term endedJan 30, 2007

Sources & verification

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