US PATENT SUBCLASS 75 / 416
.~.~.~ Combined with step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
416.~.~.~ Combined with step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) {8}
417  DF  .~.~.~.~> Obtaining metal from photographic waste
418  DF  .~.~.~.~> Obtaining metal from electrolytic slime
419  DF  .~.~.~.~> Step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions after a step at 300 degrees C or greater {1}
426  DF  .~.~.~.~> Noble metal obtained {2}
429  DF  .~.~.~.~> Copper(Cu) obtained
430  DF  .~.~.~.~> Iron(Fe), Cobalt(Co), or Nickel(Ni) obtained
431  DF  .~.~.~.~> Zinc(Zn), Cadmium(Cd), or Mercury(Hg) obtained
432  DF  .~.~.~.~> Tin(Sn) or Lead(Pb) obtained

DEFINITION

Classification: 75/416

Combined with step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.):

(under subclass 414) Process wherein a step at over 300 degrees C is combined with a step at less than 300 degrees C the latter step employing a nonmetallic material which is a liquid under standard conditions. The steps may take place in any order.

(1) Note. This subclass generally provides for a step of pyrometallurgy combined with a step of hydrometallurgy.