US PATENT SUBCLASS 423 / 530
.~.~.~.~ Utilizing metal sulfate

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  DF  .~.~ Ternary compound containing hydrogen {1}
522  DF  .~.~.~ Sulfuric acid {5}
530.~.~.~.~ Utilizing metal sulfate

DEFINITION

Classification: 423/530

(under subclass 522) Processes wherein one of the reactants or impurities is a compound of metal and the sulfate radical (SO4[supscrpt]2-[end supscrpt]).