| 75 / | HD | SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES |
| 330 | DF | PROCESSES {9} |
| 343 | DF | .~ Producing or purifying free metal powder or producing or purifying alloys in powder form (i.e., named or of size up to 1,000 microns in its largest dimension) {9} |
| 363 | DF | .~.~ At 300 degrees C or greater {5} |
| 369 | | .~.~.~ Purifying powdered metal or reducing powdered metal compound to free metal |