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Expired Canadian patentCanada

Naphthalene anti-psoriatic agents

CA 1267849 C · Owner: Young, John M. · Inventors: Jones, Gordon H.; Young, John M.; Venuti, Michael C.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The present invention is directed to a composition in a form suitable for topical administration for treating the condition of psoriasis. The composition comprises 2,3-dimethoxy-1,4-diacetyloxynaphthalene and pharmaceutically acceptable non-toxic carriers.

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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 April 17, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 17, 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 26, 1983
GrantedApril 17, 1990
Term endedApril 17, 2007
Patent numberCA 1267849 C
Classification (IPC)A61K31/21 +2 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedOct 26, 1983Patent grantedApril 17, 1990Term endedApril 17, 2007

Sources & verification

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