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Expired Canadian patentCanada

Assay device for biological activity

CA 1312650 C · Owner: Rosen, Ilana · Inventors: Rosen, Ilana; Rishpon, Judith

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Abstract From the Canadian patent

A C T :, The invention relates to a novel assay for the determination of entities having biological activity and to a device for carrying out such determinations. The assay is a very sensitive one and quantities in the picogram per millimeter range can be determined. The assay is based on chrono-coulometric measurements with sequential measurements of a plurality of samples being carried out with the aid of a multiplexer in, combination with a potentiostat, there being provided suitable electrodes and means for applying a predetermined voltage. One of the electrodes is advantageously a glassy carbon electrode, carbon felt or cloth or carbon paper. Amongst biologically active entities there …

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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 January 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2010.
  • 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 31, 1988
GrantedJanuary 12, 1993
Term endedJanuary 12, 2010
Patent numberCA 1312650 C
Classification (IPC)C12M1/40 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMarch 31, 1988Patent grantedJan 12, 1993Term endedJan 12, 2010

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