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Expired Canadian patentCanada

Long term current demand control system

CA 1193659 A · Owner: Her Majesty The Queen In Right Of Canada As Represented By The Minister Of National Defence Of Her Majesty'S Canadian Government · Inventors: Schattschneider, George K.

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

A Long Term Current Demand Control System which can be used in corrosion research is disclosed. The system is used to potentiostatically control several cathodes at several different set potentials. All cathodes can be placed in the same test tank and draw current from a single anode.

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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 September 17, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 17, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 22, 1983
GrantedSeptember 17, 1985
Term endedSeptember 17, 2002
Patent numberCA 1193659 A
Classification (IPC)G01N17/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedDec 22, 1983Patent grantedSep 17, 1985Term endedSep 17, 2002

Sources & verification

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