US PATENT SUBCLASS 204 / 179-- .~.~.~.~ Nitrogen oxides

US PATENT SUBCLASS 204 / 179
.~.~.~.~ Nitrogen oxides

Current as of: June, 1999
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204 /	HD	CHEMISTRY: ELECTRICAL AND WAVE ENERGY

*	DD	PROCESSES AND PRODUCTS {7}
164	DF	.~ Electrostatic field or electrical discharge {6}
177	DF	.~.~ Nitrogen compounds {1}
178	DF	.~.~.~ Arc or spark discharge {1}
179		.~.~.~.~ Nitrogen oxides

DEFINITION

Classification: 204/179

(under subclass 178) Processes directed to the production of nitrogen oxides.

(1) Note. This group of patents includes the recovery of the oxides even though this be accomplished by absorption in water or aqueous solutions with the change to the corresponding acid or salt. For example, processes which merely in addition to the arc synthesis of nitrogen oxides include absorption of the oxide (1) in water to form nitric, nitrous or other acid, or (2) in a alkaline solutions to form nitrites, nitrates and the like, are here included.