US PATENT SUBCLASS 423 / 27
.~.~ Leaching, washing, or dissolving

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.~.~ Leaching, washing, or dissolving {6}
28  DF  .~.~.~> Specified particle size
29  DF  .~.~.~> With a cyanide compound {2}
32  DF  .~.~.~> With ammonia or ammonium containing compound {1}
34  DF  .~.~.~> Forming insoluble substance in liquid {3}
38  DF  .~.~.~> Halogenating {2}
41  DF  .~.~.~> Sulfating

DEFINITION

Classification: 423/27

(under subclass 23) Processes, including a step of causing separation by leaching, washing or dissolving out; see Glossary.

SEE OR SEARCH CLASS

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

101+, for a process of obtaining a pure elemental metal and including the step of leaching with a chemical.