| 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} |
| 710 | DF | .~.~ Below 300 degrees C {2} |
| 711 | DF | .~.~.~ Using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) {11} |
| 724 | DF | .~.~.~.~ Displacing by another metal (i.e., electromotive series) {4} |
| 726 | DF | .~.~.~.~.~ Copper(Cu) recovered as free metal {5} |
| 729 | | .~.~.~.~.~.~ From Cyanide solution |