US PATENT SUBCLASS 423 / 521
.~.~ Ternary compound containing hydrogen

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

511  DF  SULFUR OR COMPOUND THEREOF {4}
512.1  DF  .~ Oxygen containing {11}
521.~.~ Ternary compound containing hydrogen {1}
522  DF  .~.~.~> Sulfuric acid {5}

DEFINITION

Classification: 423/521

(under subclass 512.1) Products or processes in which the compound is ternary and consists of sulfur, oxygen and hydrogen only.