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Expired Canadian patentCanada

Conductivity detector and method

CA 1180759 A · Owner: Dionex Corporation · Inventors: Evans, Barton, Jr.; Stolz, James B.

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

Disclosed is a conductivity detector for use in chromatography systems. The improved conductivity detector provides digital processing of a conductivity signal to provide improved stability. The detector compares a trial offset signal with a detected conductivity signal and when the compared values are within a predetermined value the detector processes the compared value and the final offset value thereby providing improved accuracy with higher resolution.

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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 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2002.
  • 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, 1982
GrantedJanuary 8, 1985
Term endedJanuary 8, 2002
Patent numberCA 1180759 A
Classification (IPC)G01N30/64 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedSep 17, 1982Patent grantedJan 8, 1985Term endedJan 8, 2002

Sources & verification

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