US PATENT SUBCLASS 75 / 728
.~.~.~.~.~.~ And injecting or pressurizing with air or Oxygen

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}
710  DF  .~.~ Below 300 degrees C {2}
711  DF  .~.~.~ Using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) {11}
724  DF  .~.~.~.~ Displacing by another metal (i.e., electromotive series) {4}
726  DF  .~.~.~.~.~ Copper(Cu) recovered as free metal {5}
728.~.~.~.~.~.~ And injecting or pressurizing with air or Oxygen

DEFINITION

Classification: 75/728

And injecting or pressurizing with air or Oxygen:

(under subclass 726) Process wherein air or Oxygen is injected into the liquid or process wherein the liquid is subjected to treatment with air or Oxygen at pressures exceeding atmospheric pressure.