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Expired Canadian patentCanada

Instrumentation and monitoring systems employing differential temperature

CA 1311028 C · Owner: Westinghouse Electric Corporation · Inventors: Twerdochlib, Michael

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Abstract From the Canadian patent

54,671IA, A B S T B A C T, INSTRUMENTATION AND MONITORING SYSTEMS EMPLOYING DIFFERENTIAL TEMPERATURE SENSORS A differential temperature sensor to monitor fluid level in a pressure vessel, has heated split-well, thermowells of duplex design mounted to the sidewall of a, pressure vessel and communicating through a penetration in the pressure vessel sidewall. Each probe has at least one parallel axial bore therein, a related selected pair of, probes receiving respective heater and temperature sensing elements. The temperature of the heated temperature sensor drops on contact with water, when the water level rises. The systems monitor the differential temperature outputs a plurality of such …

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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 December 1, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 1, 2009.
  • 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 16, 1989
GrantedDecember 1, 1992
Term endedDecember 1, 2009
Patent numberCA 1311028 C
Classification (IPC)G01P13/00 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMay 16, 1989Patent grantedDec 1, 1992Term endedDec 1, 2009

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