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Expired Canadian patentCanada

Metal oxide electrodes

CA 1303130 C · Owner: Lauks, Imants R. · Inventors: Lauks, Imants R.

CIPO record

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Abstract From the Canadian patent

An electrode for measuring the activity of ionic species. The electrode comprises a material which is chemically sensitive to at least one ionic species. The material comprises an insulating component and a conductive component of lower resistivity than the insulating component. The insulating component has a density of proton binding sites sufficiently large to be sensitive to the ionic species. The conductive component comprises particles, the size of which are sufficiently small to modify the bulk conductive properties such that the susceptibility of the particles to redox interference in the operation of the electrode is decreased while maintaining, sufficient conductivity to operate in …

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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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 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.
FiledFebruary 7, 1989
GrantedJune 9, 1992
Term endedJune 9, 2009
Patent numberCA 1303130 C
Classification (IPC)G01N27/30 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedFeb 7, 1989Patent grantedJune 9, 1992Term endedJune 9, 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.