US PATENT SUBCLASS 75 / 557
.~.~.~.~.~.~.~.~ Including other gas from below

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}
507  DF  .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12}
528  DF  .~.~.~.~.~ Injecting gas or nonmetalliferous liquid which gasifies into, onto, or through premelted Iron(Fe) or slag layer thereon {5}
548  DF  .~.~.~.~.~.~ Gas contains gaseous Oxygen {4}
556  DF  .~.~.~.~.~.~.~ Injecting only from below melt surface {1}
557.~.~.~.~.~.~.~.~ Including other gas from below

DEFINITION

Classification: 75/557

Including other gas from below:

(under subclass 556) Process wherein a gas other than Oxygen gas or an Oxygen gas containing gas composition is injected from below the melt surface at the same time or at a different time during the processing.