| 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} |
| 585 | DF | .~.~.~ Nonferrous {25} |
| 638 | DF | .~.~.~.~ Copper(Cu) {5} |
| 641 | DF | .~.~.~.~.~ Reduction {2} |
| 643 | | .~.~.~.~.~.~ Treating matte or sulfide {2} |
| 644 | DF | .~.~.~.~.~.~.~> Treating waste gas |
| 645 | DF | .~.~.~.~.~.~.~> With prior production of matte or sulfide |