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Expired Canadian patentCanada

Inner combustion type of gaslighter

CA 1294449 C · Owner: Tokai Corporation · Inventors: Nitta, Tomio

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

Disclosed is an improved inner combustion type of gaslighter whose inner combustion unit comprises: a mixing conduit connected to the upper end of the gas ejection nozzle; a combustion conduit integrally connected to the mixing conduit; a diffusion plate fixed in the boundary between the mixing conduit and the combustion conduit. To improve the burning efficiency by mixing the air and the combustible gas thoroughly in the combustion conduit, the diffusion plate has a plurality of apertures each having an inclined blade to cause the air drawn into the mixing conduit and the combustible gas ejected from the gas ejection nozzle to whirl in eddies.

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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 January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 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.
FiledJune 28, 1989
GrantedJanuary 21, 1992
Term endedJanuary 21, 2009
Patent numberCA 1294449 C
Classification (IPC)F23Q3/00 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJune 28, 1989Patent grantedJan 21, 1992Term endedJan 21, 2009

Sources & verification

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