| 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} |
| 513 | DF | .~.~.~.~.~ In reverberatory furnace (e.g., open-hearth, Siemens-Martin, puddling, etc.) {9} |
| 521 | DF | .~.~.~.~.~.~ With Transition metal compound {1} |
| 522 | | .~.~.~.~.~.~.~ Iron oxide |