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Expired Canadian patentCanada

Method and apparatus for detecting elements

CA 1071712 A · Owner: National Research Development Corporation · Inventors: Fray, Derek J.

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

The present invention relates to a method for the detection or determination of an element in a substance comprising that element by monitoring the e.m.f. generated between the substance and a reference material in which the reference, material is a solid electrolyte comprising a beta-alumina containing said element or other solid compound of said element, said compound being separated from the substance by said electrolyte.

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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 February 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedFebruary 12, 1980
Term endedFebruary 12, 1997
Patent numberCA 1071712 A
Classification (IPC)G01R27/14 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedFeb 12, 1980Term endedFeb 12, 1997

Sources & verification

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