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Expired Canadian patentCanada

Unitary self-generating reference gas sensor

CA 1304128 C · Owner: Lin, Ching-Yu · Inventors: Hirayama, Chikara; Lin, Ching-Yu

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

17 53,216, ABSTRACT OF THE DISCLOSURE, A solid electrolyte gas sensor 10 is made containing a body of solid electrolyte 14 in contact with, a monitor electrode 12 exposed to a monitored gas environment 13 containing selected gas components to be measured and in contact with a reference electrode 15 which is isolated from the monitored gas environment where the, solid electrolyte at the operating temperature of the gas sensor is effective to dissociate to provide the sole source of a self-generated gas, at the reference electrode 15, corresponding to the selected gas component to be measured.

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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 23, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 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.
FiledMarch 16, 1989
GrantedJune 23, 1992
Term endedJune 23, 2009
Patent numberCA 1304128 C
Classification (IPC)G01N27/40 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMarch 16, 1989Patent grantedJune 23, 1992Term endedJune 23, 2009

Sources & verification

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