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Expired Canadian patentCanada

Radiant heater system

CA 1237367 A · Owner: Combustion Research Corporation · Inventors: Johnson, Arthur C.W.

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 gas or a fired radiant energy heating system wherein a burner is connected to a long radiator tube. Means are provided for balancing the heat output over the length of the tube thereby lowering the temperature at the burner end. In one embodiment this entails use of a length or insulator in the tube adjacent the burner and a length of turbulator near the exhaust.

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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 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
  • 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 14, 1984
GrantedMay 31, 1988
Term endedMay 31, 2005
Patent numberCA 1237367 A
Classification (IPC)F24C3/04 +1 more

Timeline

Timeline From CIPO dates

1985198819911994199720002003Application filedMay 14, 1984Patent grantedMay 31, 1988Term endedMay 31, 2005

Sources & verification

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