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Expired Canadian patentCanada

Compact forced air heater

CA 1301047 C · Owner: Velie, Wally W. · Inventors: Velie, Wally W.

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

A compact forced air heater comprises a combustion chamber mounted in a housing, a burner module mounted across a back open end of the combustion chamber adjacent a back wall of the housing for producing heated air in the combustion chamber an air intake in a front wall of the housing and a high speed, (3000 rpm) forced air blower mounted between the combustion chamber and the housing front end wall. The burner module includes a flameholder plate having a central primary air hole and circular rows of staggered secondary air holes surrounding the primary air hole A flamespreader plate is mounted on the flameholder plate opposite the primary air hole and an, elongated, right-angle burner tube …

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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 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 22, 1988
GrantedMay 19, 1992
Term endedMay 19, 2009
Patent numberCA 1301047 C
Classification (IPC)F24H3/02 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMarch 22, 1988Patent grantedMay 19, 1992Term endedMay 19, 2009

Sources & verification

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