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Expired Canadian patentCanada

Cut to length heater cable

CA 1338315 C · Owner: Thermon Canada Limited · Inventors: Heizer, Glenwood Franklin

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An electrical heating cable includes at least two electrode bus wires arranged parallel to one another. The electrodes are electrically bridged at spaced apart locations by a heater wire having greater electrical resistance than said electrodes. The bus wire is fabricated from a metal having a high positive temperature coefficient (PTC) and high resistivity.

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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 7, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2013.
  • 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 22, 1989
GrantedMay 7, 1996
Term endedMay 7, 2013
Patent numberCA 1338315 C
Classification (IPC)H05B3/56 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedSep 22, 1989Patent grantedMay 7, 1996Term endedMay 7, 2013

Sources & verification

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