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Expired Canadian patentCanada

Sensing electrical parameters inside conductors

CA 1065016 A · Owner: Canadian General Electric Company Limited · Inventors: Murison, George E.; Boothman, David R.; Rehder, Robert H.

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

Parameters associated with a bus which may be, either an unshielded hollow conductor or a shielded hollow conductor, may be difficult to determine when the bus is carrying large currents at high voltages. An indicator carrying a display is mounted internally to be visible through a window and thereby avoid conductors running from a high voltage region to an external place. Thus temperature of the bus can be determined within the hollow conductor and can be used to activate a display adjacent an opening or window in the conductor. The display may be powered by a power supply mounted within the hollow conductor with the power supply deriving a voltage from longitudinally spaced points on the …

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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 October 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 23, 1996.
  • 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—
GrantedOctober 23, 1979
Term endedOctober 23, 1996
Patent numberCA 1065016 A
Classification (IPC)G01R13/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedOct 23, 1979Term endedOct 23, 1996

Sources & verification

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