US PATENT SUBCLASS 423 / 290
.~.~ Nitrogen containing

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

276  DF  BORON OR COMPOUND THEREOF {5}
289  DF  .~ Binary compound (e.g., boride, etc.) {5}
290.~.~ Nitrogen containing

DEFINITION

Classification: 423/290

(under subclass 289) Products of processes wherein the other element is nitrogen.