US PATENT SUBCLASS 423 / 83
.~.~.~ Forming metallic iron or insoluble iron containing compound

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}
69  DF  .~ Group IVB metal (Ti, Zr, or Hf) {11}
82  DF  .~.~ Treating with sulfur or halogen containing acid {1}
83.~.~.~ Forming metallic iron or insoluble iron containing compound

DEFINITION

Classification: 423/83

(under subclass 82) Processes which include the formation of iron in elemental form or of an insoluble iron containing compound.