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Expired Canadian patentCanada

Laser-excitation fluorescence detection electrokinetic separation

CA 1309058 C · Owner: Board Of Trustees Of Leland Stanford Junior University (The) · Inventors: Gassmann, Ernst; Zare, Richard N.

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Abstract From the Canadian patent

Abstract of the Invention An electrokinetic process and apparatus employing coherent radiation-excited fluorescence for detection is disclosed. Specifically, the detection of electrokinetically-transported target species as said species pass in a support electrolyte through a detection volume can be carried out with improved efficiency when the detection event associated with the passage of the species through the detection volume is a change in emitted light in particular, fluorescence, which emitted light has been generated by a beam of electromagnetic radiation supplied on-column by a coherent source. The use of coherent radiation source permits the radiation of a well-defined wavelength …

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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 October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 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.
FiledSeptember 17, 1986
GrantedOctober 20, 1992
Term endedOctober 20, 2009
Patent numberCA 1309058 C
Classification (IPC)G01N21/64 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 17, 1986Patent grantedOct 20, 1992Term endedOct 20, 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.