US PATENT SUBCLASS 423 / 150.1
.~.~ 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}
138  DF  .~ Iron group metal (Fe, Co, or Ni) {7}
150.1.~.~ Leaching, washing, or dissolving {3}
150.2  DF  .~.~.~> Spent catalyst
150.3  DF  .~.~.~> Treatment of iron containing waste mixture
150.4  DF  .~.~.~> Treatment of matte or nodule {2}

DEFINITION

Classification: 423/150.1

Leaching, washing, or dissolving:

(under subclass 138) Processes which include removing or bringing into solution matter by leaching, washing, or dissolving out a portion of the mixture - see glossary.

SEE OR SEARCH THIS CLASS, SUBCLASS:

140+, for leaching processes which further include a step of forming an insoluble substance in a liquid.