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Expired Canadian patentCanada

Monitoring system for use with elongate heater units

CA 1254605 A · Owner: Raychem Corporation · Inventors: Frank, Louis M.

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 monitoring system that may be employed with elongate heater units to provide information about a measurable parameter, for example the temperature of a heated substrate. The monitoring system may include many heater units and associated transmitter-receiver assemblies. The heater units as well as the assemblies can all be of the same kind. The many heater units and assemblies can be connected to a common power supply and the monitoring system can correlate the information provided by a particular receiver with a particular heater unit.

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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 May 23, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 23, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 1, 1985
GrantedMay 23, 1989
Term endedMay 23, 2006
Patent numberCA 1254605 A
Classification (IPC)H05B1/02 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedNov 1, 1985Patent grantedMay 23, 1989Term endedMay 23, 2006

Sources & verification

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