US PATENT SUBCLASS 75 / 510
.~.~.~.~.~.~ Vacuum lift

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}
433  DF  .~.~.~ Iron(Fe) {18}
507  DF  .~.~.~.~ Melting Iron(Fe) or treating molten Iron {12}
508  DF  .~.~.~.~.~ Vacuum treatment of molten Iron(Fe) {3}
510.~.~.~.~.~.~ Vacuum lift {1}
511  DF  .~.~.~.~.~.~.~> With addition of gas

DEFINITION

Classification: 75/510

Vacuum lift:

(under subclass 508) Process in which a vacuum causes a molten metal that contains over 50 percent by weight Iron (Fe) to be lifted above the level of the container in which it is held.

(1) Note. A common arrangement is as shown: [figure]