US PATENT SUBCLASS 423 / 91
.~.~.~ Treating with free halogen or hydrogen halide

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}
89  DF  .~ Group IVA metal (Ge, Sn, or Pb) {5}
90  DF  .~.~ Detinning {1}
91.~.~.~ Treating with free halogen or hydrogen halide

DEFINITION

Classification: 423/91

(under subclass 90) Processes in which the article or waste material is treated with a halogen which is either in the free state or combined with hydrogen as a halogen containing acid.