US PATENT SUBCLASS 75 / 419
.~.~.~.~ 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

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}
416  DF  .~.~.~ Combined with step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) {8}
419.~.~.~.~ 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}
420  DF  .~.~.~.~.~> Step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions is reduction to free metal {3}

DEFINITION

Classification: 75/419

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:

(under subclass 416) Process wherein a step at less than 300 degrees C using nonmetallic material which is liquid under standard conditions occurs after a step at 300 degrees C or greater.