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Expired Canadian patentCanada

Method of detecting troubles of temperature control device

CA 1196709 A · Owner: Sharp Kabushiki Kaisha · Inventors: Tateda, Koichi

CIPO record

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Abstract From the Canadian patent

Abstract:, The present invention relates to an improved trouble detecting method for a temperature control device including a thermo-sensitive element such as a thermister or the like. Such temperature thermo-sensitive elements are used in heating apparatuses, for example a cooking, apparatus or the like. The detecting method includes the steps of energizing the temperature control device for a predetermined period of time, and comparing an output of the temperature control device and a reference output. The continued energization of the cooking apparatus for, example, is dependent on the outcome of this time delayed comparison. The time delay allows the temperature sensitive element to …

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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 November 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 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.
FiledSeptember 23, 1982
GrantedNovember 12, 1985
Term endedNovember 12, 2002
Patent numberCA 1196709 A
Classification (IPC)F24C15/00 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedSep 23, 1982Patent grantedNov 12, 1985Term endedNov 12, 2002

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