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Expired Canadian patentCanada

Ceramic burner for a hot-blast stove

CA 1303849 C · Owner: Stokman, Ronald Johannes Maria · Inventors: Stokman, Ronald Johannes Maria; Felthuis, Jacob

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 ceramic burner for a hot blast stove having a burner head where the combustion components mix and an air duct and a gas duct beneath the head for conducting combustion components to the head the gas duct is within the air duct and is bounded by a wall. To prevent stresses due to differences of thermal expansion at least one horizontal sliding joint is arranged in the bounding wall of the gas duct closely under the burner head. The air duct is bounded by a brickwork wall which continues upwardly past the burner head and forms a combustion chamber. The burner head projects over and is supported by a shoulder in this wall and an essentially vertical expansion joint is located between the …

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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 June 23, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 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.
FiledAugust 29, 1988
GrantedJune 23, 1992
Term endedJune 23, 2009
Patent numberCA 1303849 C
Classification (IPC)C21B9/10 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 29, 1988Patent grantedJune 23, 1992Term endedJune 23, 2009

Sources & verification

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