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Expired Canadian patentCanada

Radiant heating

CA 1088412 A · Owner: Smith, Thomas M. · Inventors: Smith, Thomas M.

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

Improved gas-fired radiant heater has porous refractory panel mounted by its edges on a support to define a gaseous combustion mixture plenum from which the mixture flows through the panel to burn at its outer face and a conduit for, non-combustible gas extends along the margin of the panel and discharges the non-combustible gas through the panel all along its margin to keep the combustion mixture from escaping through the panel edges where burning can damage the panel and to keep the panel support relatively cool. No further sealing of the panel margin is needed, but the sealing is effected with less of non-combustible gas if the panel edges are compressed so as to reduce their thickness …

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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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 6, 1977
GrantedOctober 28, 1980
Term endedOctober 28, 1997
Patent numberCA 1088412 A
Classification (IPC)F23D14/16 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedApril 6, 1977Patent grantedOct 28, 1980Term endedOct 28, 1997

Sources & verification

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