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Expired Canadian patentCanada

Process for immunochromatography with colloidal particles

CA 1306675 C · Owner: Gordon, Julian · Inventors: Gordon, Julian; Ching, Shanfun; Billing, Patricia A.

CIPO record

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Abstract From the Canadian patent

The present invention relates to improved specific binding assay methods, kits and devices utilizing chromatographically mobile specific binding reagents labelled with colloidal particles. Specific binding reagents labelled with colloidal particles such as gold and selenium may be subjected to rapid chromatographic solvent transport on chromatographic media by means of selected solvents and chromatographic transport facilitating agents. Further impregnation of, solid substrate materials with labile protein materials including colloidal particle and enzyme labelled reagents in the presence of meta-soluble proteins provides for the rapid resolubilization of such materials which have been …

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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 August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 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.
FiledJuly 12, 1988
GrantedAugust 25, 1992
Term endedAugust 25, 2009
Patent numberCA 1306675 C
Classification (IPC)G01N33/54 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJuly 12, 1988Patent grantedAug 25, 1992Term endedAug 25, 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.