US PATENT SUBCLASS 423 / 658
.~.~.~ Iron

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

644  DF  HYDROGEN OR COMPOUND THEREOF {3}
648.1  DF  .~ Elemental hydrogen {6}
657  DF  .~.~ By reacting water or aqueous solution with metal or compound thereof {1}
658.~.~.~ Iron

DEFINITION

Classification: 423/658

(under subclass 657) Processes wherein the metal is iron.