| 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} |
| 501 | | .~.~.~.~.~ Gas injection below surface of melt |