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Expired Canadian patentCanada

Simultaneous enzyme immunoassay for detecting antigen and/or antibody in humans

CA 1303494 C · Owner: Coulter Corporation · Inventors: Lee, Song Y.; Smariga, Paulette E.; Kortright, Kenneth H.

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Abstract From the Canadian patent

A solid-phase immunoassay is provided for determination of members of an immunological pair of such antigen and/or antibody of a single binding pair in human physiological fluid wherein a, single immunoassay enables simultaneous detection of antigen and/or antibody of a single binding pair in a test sample which may have circulating antigen and/or antibody. The immunoassay is characterized by the addition of an amount of antigen or "spike" of the binding pair to the test sample prior to incubation of the test sample in the presence of a solid-phase absorbed antibody of the binding pair. The test sample preferably also is subjected to a lysing reagent prior to the incubation for uniformly …

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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 16, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 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.
FiledMay 16, 1988
GrantedJune 16, 1992
Term endedJune 16, 2009
Patent numberCA 1303494 C
Classification (IPC)G01N33/53 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 16, 1988Patent grantedJune 16, 1992Term endedJune 16, 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.