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Expired Canadian patentCanada

The use of arginine as an immunostimulator

CA 2071971 C · Owner: Kelly, Robert Edward · Inventors: Kelly, Robert Edward; Reis, Brenda Leah; Barbul, Adrian

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

The present invention relates to the treatment of an impaired human immune response or to reduction of the severity of degradation of the human immune response by the administration of arginine or ornithine, or a functional analog of arginine or ornithine, or mixtures thereof, to humans suffering from an impaired immune response or at risk of suffering an impaired immune response. Such treatment is provided by enterally administering compositions supplemented with arginine or ornithine or, functional analogs of arginine or ornithine or parenterally administering , amino acid solutions supplemented with arginine or ornithine, or functional analogs of arginine or ornithine to the patient.

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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 December 28, 1990 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 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.
FiledDecember 28, 1990
GrantedNovember 20, 2001
Term endedDecember 28, 2010
Patent numberCA 2071971 C
Classification (IPC)A61K31/19 +2 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedDec 28, 1990Patent grantedNov 20, 2001Term endedDec 28, 2010

Sources & verification

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