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Expired Canadian patentCanada

Macrophage stimulating protein for the treatment of gastrointestinal disorders

CA 2249666 C · Owner: Zhang, Ke · Inventors: Zhang, Ke

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

Methods for treating gastrointestinal tract disorders by protection regeneration and repair of intestinal epithelium are described. Macrophage stimulating protein is found to promote colony formation by crypt cells and may be involved in stimulating proliferation of intestinal crypt cells. Also described are pharmaceutical compositions for MSP and methods for identifying substances that stimulate crypt cell proliferation.

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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 March 25, 1997 and granted May 14, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 25, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1997
GrantedMay 14, 2002
Term endedMarch 25, 2017
Patent numberCA 2249666 C
Classification (IPC)A61K38/18 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedMarch 25, 1997Patent grantedMay 14, 2002Term endedMarch 25, 2017

Sources & verification

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