US PATENT SUBCLASS 423 / 633
.~.~.~ Ferric oxide

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

579  DF  OXYGEN OR COMPOUND THEREOF {4}
592  DF  .~ Metal containing {12}
632  DF  .~.~ Iron {1}
633.~.~.~ Ferric oxide {1}
634  DF  .~.~.~.~> Gamma form

DEFINITION

Classification: 423/633

(under subclass 632) Products or processes wherein the compound is ferric oxide (Fe2O3).

SEE OR SEARCH THIS CLASS, SUBCLASS:

632, for ferriferous oxide (Fe3[end subscrpt]O4) composed of a one to one mixture of ferrous oxide (FeO) and ferric oxide (Fe2O3) and see (1) Note thereunder.