US PATENT SUBCLASS 423 / 304
.~ Oxygen containing

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

299  DF  PHOSPHORUS OR COMPOUND THEREOF {5}
304.~ Oxygen containing {2}
305  DF  .~.~> Metal or ammonium containing {5}
316  DF  .~.~> Ternary compound containing hydrogen {1}

DEFINITION

Classification: 423/304

(under subclass 299) Products or processes wherein the product contains oxygen.