| 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} |
| 416 | DF | .~.~.~ Combined with step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) {8} |
| 417 | | .~.~.~.~ Obtaining metal from photographic waste |