US PATENT SUBCLASS 75 / 638
.~.~.~.~ Copper(Cu)


Current as of: June, 1999
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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.~.~.~.~ Copper(Cu) {5}
639  DF  .~.~.~.~.~> Treating material in gaseous suspension
640  DF  .~.~.~.~.~> Treating slag or dross
641  DF  .~.~.~.~.~> Reduction {2}
646  DF  .~.~.~.~.~> Treating molten Copper(Cu) {3}
653  DF  .~.~.~.~.~> Melting Copper(Cu) in shaft furnace


DEFINITION

Classification: 75/638

Copper (Cu):

(under subclass 585) Process in which Copper (Cu) is produced or a metal that contains over 50 percent by weight Copper is treated.