US PATENT SUBCLASS 423 / 381
.~.~.~.~ And using catalyst

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}
380  DF  .~.~.~ Utilizing free nitrogen as reactant {2}
381.~.~.~.~ And using catalyst

DEFINITION

Classification: 423/381

(under subclass 380) Processes which include the use of a catalyst.