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Expired Canadian patentCanada

Ion selective electrode

CA 1233511 A · Owner: Arden Medical Systems, Inc. · Inventors: Knudson, Mark B.; Sembrowich, Walter L.; Guruswamy, Vinodhini

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An ion selective electrode includes a, conductive electrode body which is supported by an insulating substrate. A convex dome-shaped membrane containing an electroactive species is deposited over and is directly in contact with the electrode body and a surface of the substrate surrounding the electrode body. The membrane has its greatest height above the electrode body and slopes down to meet the surface of the substrate . A moat formed in the insulating substrate surrounds and is spaced from the electrode body to define the outer boundary of the dome-shaped membrane .

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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 March 1, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 1, 2005.
  • 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 10, 1985
GrantedMarch 1, 1988
Term endedMarch 1, 2005
Patent numberCA 1233511 A
Classification (IPC)G01N27/33

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedSep 10, 1985Patent grantedMarch 1, 1988Term endedMarch 1, 2005

Sources & verification

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