US PATENT SUBCLASS 423 / 374
.~.~.~.~ Utilizing nitric oxide or free nitrogen as reactant

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

351  DF  NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID) {5}
364  DF  .~ Carbon containing {7}
371  DF  .~.~ Ternary compound {4}
372  DF  .~.~.~ Hydrogen cyanide {4}
374.~.~.~.~ Utilizing nitric oxide or free nitrogen as reactant

DEFINITION

Classification: 423/374

(under subclass 372) Processes which include the use of free nitrogen or nitric oxide in a reaction.

(1) Note. The presence of air in the reaction zone is not sufficient to classify a patent herein, unless clearly disclosed as the source of nitrogen.