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Expired Canadian patentCanada

In vitro assay for detecting cell-mediated immune responses

CA 1299099 C · Owner: Corner, Leigh Austin · Inventors: Corner, Leigh Austin; Wood, Paul Richard

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An in vitro method of detecting a cell-mediated immune response to a specific antigen in a human or animal, comprises the steps of: (i) incubating a whole blood sample from the human or animal with the specific antigen; and (ii) detecting the presence of gamma interferon (.gamma.IFN) released by sensitized lymphocytes in the whole blood sample to indicate a cell-mediated immune response to the specific antigen. A diagnostic kit is also disclosed.

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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 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 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.
FiledMarch 5, 1987
GrantedApril 21, 1992
Term endedApril 21, 2009
Patent numberCA 1299099 C
Classification (IPC)G01N33/56 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMarch 5, 1987Patent grantedApril 21, 1992Term endedApril 21, 2009

Sources & verification

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