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Expired Canadian patentCanada

Gas turbine combustor

CA 1258379 A · Owner: Hitachi, Ltd. · Inventors: Segawa, Yorihide; Akatsu, Shigeyuki; Ohmori, Takashi

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

Abstract:, A gas turbine combustor that produces a small amount of NOx has a head combustion chamber and a rear combustion chamber which is larger in diameter than the head combustion chamber. The head combustion chamber is provided with an axially extending hollow frustoconical tubular member to form an annular combustion space therein. Air holes are provided for axially jetting air into the annular combustion chamber. There are also air holes formed on the peripheral wall for injecting air and a plurality of fuel nozzles projected into the annular combustion space for injecting fuel into a vortex formed by the air jet and the injected air flow whereby, the flame is stabilized and lean …

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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 August 15, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 15, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 10, 1985
GrantedAugust 15, 1989
Term endedAugust 15, 2006
Patent numberCA 1258379 A
Classification (IPC)F23R3/34 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJuly 10, 1985Patent grantedAug 15, 1989Term endedAug 15, 2006

Sources & verification

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