US PATENT SUBCLASS 423 / 36
.~.~.~.~ Sulfating

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

1  DF  TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15}
23  DF  .~ Group IB metal (Cu, Ag, or Au) {10}
27  DF  .~.~ Leaching, washing, or dissolving {6}
34  DF  .~.~.~ Forming insoluble substance in liquid {3}
36.~.~.~.~ Sulfating

DEFINITION

Classification: 423/36

(under subclass 34) Processes which includes chemically forming a compound having the sulfate (SO4[supscrpt]2-[end supscrpt]) radical.

(1) Note. In this subclass may be found disclosures to double sulfates of a monovalent metal and a tri-valent metal.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose

Metal Particulate Mixtures,

110, and 115+ for a process of obtaining a pure elemental metal and which involves the formation of a sulfate compound.