US PATENT SUBCLASS 423 / 41
.~.~.~ 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}
41.~.~.~ Sulfating


DEFINITION

Classification: 423/41

(under subclass 27) Processes which include chemically forming a compound having the sulfate (SO[supscrpt]4[end supscrpt]2[supscrpt]-[end supscrpt]) radical.

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36, for a process of forming a similar metal compound which includes the step of forming a sulfate as well as the steps of leaching or dissolution and causing a substance to become insoluble in, or precipitate out of a liquid or slurry.

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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 which includes the step of sulfating.