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Expired Canadian patentCanada

Cell-free t cell antigen receptor and its clinical utilities

CA 1304288 C · Owner: Astra Ab · Inventors: Brown, Michael C.; Kung, Patrick C.; Ip, Stephen H.

CIPO record

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Abstract From the Canadian patent

Cell-free or released T cell antigen receptors immunoassays which allow the detection of the released T cell antigen receptor in cell culture supernatants cell lysates, and biological fluids, as well as diagnostic and therapeutic compositions and methods for monitoring and treating certain diseases or disorders which elicit or involve a T cell response are described. The released T cell antigen receptors described herein differ from the cell membrane bound antigen receptors and appear to exist in a variety of forms, some of which may be complexed with other T cell determinants such as the T3 antigen. Despite the size heterogeneity of the released T cell antigen receptors or …

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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 June 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
  • 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 3, 1986
GrantedJune 30, 1992
Term endedJune 30, 2009
Patent numberCA 1304288 C
Classification (IPC)G01N33/53 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 3, 1986Patent grantedJune 30, 1992Term endedJune 30, 2009

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