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Expired Canadian patentCanada

PHARMACEUTICAL AND DIETARY COMPOSITION CONTAINING .alpha.-LINOLEIC ACID

CA 1280370 C · Owner: Efamol Limited · Inventors: Casper, Robert; Horrobin, David Frederick

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

Method of prevention or treatment of endometriosis wherein effective amounts of one or both of i) gamma-linolenic acid and/or dihomo-gamma-linolenic acid and ii) 18:4 n-3 and/or one or more of the metabolites of 18:4 n-3 (20:4 n-3 20:5 n-3, 22:5 n-3 or 22:6 n-3) are administered against endometriosis as such or in the form of an ester, salt amide or other derivative, convertible in the body thereto alone or in an acceptable, pharmaceutical carrier or diluent.

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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 February 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 2008.
  • 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 1, 1986
GrantedFebruary 19, 1991
Term endedFebruary 19, 2008
Patent numberCA 1280370 C
Classification (IPC)A61K31/20 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedOct 1, 1986Patent grantedFeb 19, 1991Term endedFeb 19, 2008

Sources & verification

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