US PATENT SUBCLASS 75 / 646
.~.~.~.~.~ Treating molten 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  DF  .~.~.~.~ Copper(Cu) {5}
646.~.~.~.~.~ Treating molten Copper(Cu) {3}
647  DF  .~.~.~.~.~.~> By vacuum
648  DF  .~.~.~.~.~.~> Adding gas {2}
652  DF  .~.~.~.~.~.~> Adding solid

DEFINITION

Classification: 75/646

Treating molten Copper (Cu):

(under subclass 638) Process in which a molten metal that contains over 50 percent by weight Copper (Cu) is treated.