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Expired Canadian patentCanada

Membrane anchor for ion-selective electrodes

CA 1282458 C · Owner: Schapira, Thomas G. · Inventors: Schapira, Thomas G.; Geist, Jill M.

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

A membrane anchor for an ion-selective electrode may be formed by intersolubilizing an ion-selective membrane lying above a sensing pad with a region of thermoplastic material laterally disposed around the membrane. A first layer of electrically insulating thermoset material lies beneath the thermoplastic material and in intimate contact with an electrically insulating susbstrate. A second layer of exposed thermoset material lies above the thermoplastic material and contacts the first layer of thermoset material around the entire lateral perimeter of the thermoset material. The membrane anchor may be usefully employed with an ion-selective electrode having an electrically insulating …

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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 April 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 18, 1988
GrantedApril 2, 1991
Term endedApril 2, 2008
Patent numberCA 1282458 C
Classification (IPC)G01N27/30 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMay 18, 1988Patent grantedApril 2, 1991Term endedApril 2, 2008

Sources & verification

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