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Expired Canadian patentCanada

Membrane assay using focused sample application

CA 1309654 C · Owner: Monoclonal Antibodies, Inc. · Inventors: Hay-Kaufman, Martha L.; Becker, Rosette; Danisch, Robert

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

Abstract of the Disclosure, Methods and kits are described for performing immunoassays. The kit includes a reaction cell having a microporous membrane and an absorbent capable of drawing liquid sample through the membrane. An applicator is provided for applying a small volume of the liquid sample to the membrane by contacting a port of the applicator to the membrane and allowing the sample to flow therethrough by capillary action. Analyte in the sample is immobilized typically by, immunoadsorption, and the immobilized analyte may then be visualized using conventional signal producing systems, such as color, fluorescence, and luminescent systems. A:4.TXT

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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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 2, 1988
GrantedNovember 3, 1992
Term endedNovember 3, 2009
Patent numberCA 1309654 C
Classification (IPC)G01N33/53 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedDec 2, 1988Patent grantedNov 3, 1992Term endedNov 3, 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.