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Expired Canadian patentCanada

Synthesis of tumor antigenic determinant

CA 1203532 A · Owner: Ratcliffe, R. Murray · Inventors: Lemieux, Raymond U.; Ratcliffe, R. Murray; Baker, Donald A.

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Abstract From the Canadian patent

SYNTHESIS OF TUMOR ARTIGENIC DETERMINANT" ABSTRACT OF THE DISCLOSURE, Processes are provided for the synthesis of the human T-antigenic determinant 2-acetamido-2-deoxy-3-0-(.beta.-D-galactopyranosyl)-.alpha.-Dgalactopyranoside containing an .alpha.-0-glycosidically linked bridging arm O-(CH2)n COR . The determinant is coupled to carrier molecules to form artificial T-antigens, and to insoluble supports to form T-immunoadsorbents. The artificial T-antigen is shown to elicit a delayed type hypersensitivity reaction as a diagnostic for the presence of cancer in humans.

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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 April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 26, 1981
GrantedApril 22, 1986
Term endedApril 22, 2003
Patent numberCA 1203532 A
Classification (IPC)C07H5/04 +2 more

Timeline

Timeline From CIPO dates

19821985198819911994199720002003Application filedJune 26, 1981Patent grantedApril 22, 1986Term endedApril 22, 2003

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