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Expired Canadian patentCanada

Methods for providing internal references for use in analyte-receptor assays

CA 1286987 C · Owner: Valkirs, Gunars E. · Inventors: Anderson, Richard R.; Valkirs, Gunars E.

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Abstract From the Canadian patent

A method is disclosed for providing internal references for use in an analyte-receptor assay for the, determination of a target analyte in a sample. The assay uses a signal producing system and an analyte receptor capable of binding the target analyte at a discrete test zone on a solid phase, in an amount directly proportional to the amount of target analyte in the sample. The method comprises binding a reference receptor, selected to bind with an analyte receptor conjugate capable of complexation with the target analyte, at a discrete reference zone on a solid phase. The reference receptor is selected such that the rates of binding of the analyte receptor conjugate to the reference …

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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 July 30, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 30, 2008.
  • 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 20, 1987
GrantedJuly 30, 1991
Term endedJuly 30, 2008
Patent numberCA 1286987 C
Classification (IPC)G01N33/54

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedMarch 20, 1987Patent grantedJuly 30, 1991Term endedJuly 30, 2008

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