US PATENT SUBCLASS 75 / 670
.~.~.~.~ Mercury(Hg)

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}
670.~.~.~.~ Mercury(Hg)

DEFINITION

Classification: 75/670

Mercury (Hg):

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

388+, for a process in which an amalgam is broken to produce free metal.