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Expired Canadian patentCanada

Ex-vivo priming for generating cytotoxic t lymphocytes specific for non-tumor antigens to treat autoimmune and allergic disease

CA 2447593 C · Owner: Janssen Pharmaceuticals, Inc. · Inventors: Degraw, Juli; Peterson, Per A.; Shi, Weixing

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Abstract From the Canadian patent

Cytotoxic T lymphocytes (CTLs specific for antigenic peptides derived from IgE molecule can be generated in vitro by stimulating resting naïve CD8 T celles with IgE peptides presented by artificial antigen presenting cells. The IgE specific CTLs lyse the target cells loaded with IgE peptides in vitro and inhibit antigen specific IgE response in vivo. In addition adoptive transfer , of the IgE specific CTL to an asthmatic mouse model can inhibit the development of lung inflammation and airway hypersensitivity. IgE specific CTL provides a treatment for allergic asthma and other IgE-mediated allergic diseases. Antigenic peptides identified from non-tumor self-antigens induce specific …

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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 May 13, 2002 and granted July 8, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 13, 2022.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 13, 2024.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 13, 2002
GrantedJuly 8, 2014
Term endedMay 13, 2022
Patent numberCA 2447593 C
Classification (IPC)C12N5/07 +1 more

Timeline

Timeline From CIPO dates

2003200520072009201120132015201720192021Application filedMay 13, 2002Patent grantedJuly 8, 2014Term endedMay 13, 2022

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