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Expired Canadian patentCanada

Combustion process with reduced nitrogen oxides exhaust

CA 1111338 A · Owner: Mitsubishi Jukogyo Kabushiki Kaisha · Inventors: Takahashi, Yasuro; Hashiguchi, Minoru; Murakami, Nobuaki

CIPO record

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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 combustion process is improved so as to reduce a nitrogen oxides content in an exhaust gas. The improvement exits in that a fuel is incompletely burnt then into an exhaust, gas produced by the incomplete combustion is supplied a gas containing oxygen so that an oxygen concentration of about 0.3% or less with respect to the amount of said exhaust gas may be obtained, and further a necessary amount of air for completely burning an unburned fuel content is supplied to its downstream to burn said unburned fuel content.

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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 October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 21, 1978
GrantedOctober 27, 1981
Term endedOctober 27, 1998
Patent numberCA 1111338 A
Classification (IPC)F23N3/00 +2 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedDec 21, 1978Patent grantedOct 27, 1981Term endedOct 27, 1998

Sources & verification

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