US PATENT SUBCLASS 75 / 441
.~.~.~.~.~ Directly from Iron(Fe) compound only (no metallic Iron)

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}
438  DF  .~.~.~.~ Making wrought Iron(Fe) {3}
441.~.~.~.~.~ Directly from Iron(Fe) compound only (no metallic Iron) {1}
442  DF  .~.~.~.~.~.~> In moving furnace

DEFINITION

Classification: 75/441

Directly from Iron (Fe) compound only (no metallic Iron):

(under subclass 438) Process wherein over 50 percent of the Iron (Fe) in the final wrought Iron product is added to the process as an Iron compound, such as ore, instead of in the metallic state.