US PATENT SUBCLASS 423 / 132
.~.~.~ With acid

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}
111  DF  .~ Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be) {9}
131  DF  .~.~ Leaching, washing, or dissolving {1}
132.~.~.~ With acid

DEFINITION

Classification: 423/132

(under subclass 131) Processes in which an acid is used as the leaching, washing or the solvent medium.