US PATENT SUBCLASS 75 / 697
.~.~.~.~.~ Treating molten Lead(Pb)


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}
693  DF  .~.~.~.~ Lead(Pb) {3}
697.~.~.~.~.~ Treating molten Lead(Pb) {3}
698  DF  .~.~.~.~.~.~> By vacuum
699  DF  .~.~.~.~.~.~> Adding gas {1}
701  DF  .~.~.~.~.~.~> Adding solid {1}


DEFINITION

Classification: 75/697

Treating molten Lead (Pb):

(under subclass 693) Process in which a molten metal that contains over 50 percent by weight Lead (Pb) is treated.