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Expired Canadian patentCanada

Forced convection tunnel oven

CA 2028330 C · Owner: Smith, Donald P. · Inventors: High, Jarald E.; Smith, Donald P.; Plumb, William 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

The tunnel oven generally includes a long cooking compartment through which a conveyor transports food products. The conveyor is spaced from a front wall of the cooking compartment to provide an air return route and to provide a walkway to facilitate cleaning and maintenance of the oven. A blower draws air from the cooking compartment and discharges air into an air distribution chamber formed in an upper portion of the cooking chamber and vertically spaced from the conveyor. A pair of plenums in the cabinet adjacent one edge of the conveyor deliver air from the distribution chamber to a plurality of air dispensing ducts communicating with the plenums on opposite sides of the conveyor for …

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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

  • Filed October 23, 1990 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 23, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 23, 1990
GrantedMay 29, 2001
Term endedOctober 23, 2010
Patent numberCA 2028330 C
Classification (IPC)A21B1/00

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedOct 23, 1990Patent grantedMay 29, 2001Term endedOct 23, 2010

Sources & verification

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