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Expired Canadian patentCanada

Process and test carrier for the determination of an analyte

CA 1293189 C · Owner: Wilk, Hans-Erich · Inventors: Freitag, Helmut; Wilk, Hans-Erich; Rothe, Anselm

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

A process and test device for the determination of an analyte in a body fluid, in which there are used two binding components capable of specifically binding with one another, one of the binding components being enzyme-labelled and not carrier-fixed and the other binding component being carrier-fixed; the binding components are incubated with one another so that a binding reaction takes place; the amount of enzymelabelled binding component not bound to the carrier-fixed binding component being a measure for the concentration of the analyte which is determined by allowing the labelling enzyme to act upon a substrate producing a detection signal; during the specific binding reaction …

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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 December 17, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 17, 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.
FiledNovember 25, 1987
GrantedDecember 17, 1991
Term endedDecember 17, 2008
Patent numberCA 1293189 C
Classification (IPC)G01N33/54 +2 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedNov 25, 1987Patent grantedDec 17, 1991Term endedDec 17, 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.