US PATENT SUBCLASS 75 / 505
.~.~.~.~ Reduction with externally applied gas (e.g., batch HyL process, etc.)

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
433  DF  .~.~.~ Iron(Fe) {18}
505.~.~.~.~ Reduction with externally applied gas (e.g., batch HyL process, etc.)

DEFINITION

Classification: 75/505

Reduction with externally applied gas (e.g., batch HyL process, etc.):

(under subclass 433) Process wherein an Iron (Fe) compound is reduced to metallic Iron by a gas which is added to the Iron compound from outside the apparatus in which the Iron compound is reduced.

(1) Note. Gas generated by in situ reactions within the apparatus containing the Iron compound is not "externally applied" for purposes of this class.