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Expired Canadian patentCanada

High speed fault diverter switch for gas-insulated systems

CA 1086375 A · Owner: Gould Inc. · Inventors: Schuetz, Willy; Cronin, John C.

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 high speed fault diverter switch is connected near the input side of a gas-insulated substation. The switch is normally open and is used in response to arcing anywhere within the substation to connect the gas-insulated high-voltage conductor to ground for each phase of the system at high speed to divert the fault current to ground.

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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 23, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 23, 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.
FiledSeptember 14, 1977
GrantedSeptember 23, 1980
Term endedSeptember 23, 1997
Patent numberCA 1086375 A
Classification (IPC)H02B5/00 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedSep 14, 1977Patent grantedSep 23, 1980Term endedSep 23, 1997

Sources & verification

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