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Expired Canadian patentCanada

Variable air flow oven

CA 1091525 A · Owner: West, Clarence W. · Inventors: West, Clarence 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 variable air flow oven is disclosed in which a variable air directing control means delivers varying amounts of heated air under various positive pressures in an alternating pattern to jet orifices in opposite side walls of the oven in an inverse ratio. Hot air jets from opposite sides of the oven meet at points of common velocity in the processing chamber to produce a turbulent mixing of the hot air in a vertical plane. The turbulent heated air travels form one side of the oven to the other at a constant rate under the controlled operation of a motor driven mechanical linkage arrangement to assure even baking cooking or drying of the products being processed through the entire processing …

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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 December 16, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 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.
FiledFebruary 15, 1978
GrantedDecember 16, 1980
Term endedDecember 16, 1997
Patent numberCA 1091525 A
Classification (IPC)F27B9/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedFeb 15, 1978Patent grantedDec 16, 1980Term endedDec 16, 1997

Sources & verification

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