US PATENT SUBCLASS 423 / 325
.~ Oxygen containing

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

324  DF  SILICON OR COMPOUND THEREOF {4}
325.~ Oxygen containing {2}
326  DF  .~.~> Metal containing (i.e., silicate) {3}
335  DF  .~.~> Silica {5}

DEFINITION

Classification: 423/325

(under subclass 324) Products or processes wherein the product contains oxygen.