US PATENT SUBCLASS 431 / 5-- .~ Burning waste gas, e.g., furnace gas, etc.

US PATENT SUBCLASS 431 / 5
.~ Burning waste gas, e.g., furnace gas, etc.

Current as of: June, 1999
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431 /	HD	COMBUSTION

2	DF	PROCESS OF COMBUSTION OR BURNER OPERATION {8}
5		.~ Burning waste gas, e.g., furnace gas, etc.

DEFINITION

Classification: 431/5

(under subclass 2) Processes of burning combustible constituents remaining in the gaseous waste effluent of an industrial or power plant or process.

SEE OR SEARCH THIS CLASS, SUBCLASS:

202, for the structural installation of a combustion device that may use waste gas as fuel, e.g., flare burner, etc.

SEE OR SEARCH CLASS

60, Power Plants,

272+, for the handling or treatment of the exhaust of an internal combustion engine.

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

198+, for a furnace that may be used for such purification.

423, Chemistry of Inorganic Compounds,

210+, for purifying or separating gases by chemical reaction and note especially 212+ for exhaust gases.