US PATENT SUBCLASS 75 / 502
.~.~.~.~.~ Gas injection over surface of melt (e.g., as in reverberatory furnace, 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}
500  DF  .~.~.~.~ Reduction in molten state {2}
502.~.~.~.~.~ Gas injection over surface of melt (e.g., as in reverberatory furnace, etc.)

DEFINITION

Classification: 75/502

Gas injection over surface of melt (e.g., as in reverberatory furnace, etc.):

(under subclass 500) Process wherein gas is passed over the surface of the melt.

(1) Note. This gas may be a reducing flame as in a reverberatory furnace.