US PATENT SUBCLASS 266 / 208
.~.~ By application of vacuum

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

200  DF  MEANS FOR MELTING OR VAPORIZING METAL OR TREATING LIQUEFIED METAL {19}
207  DF  .~ By providing, treating or protecting environment, e.g., vacuum {1}
208.~.~ By application of vacuum {2}
209  DF  .~.~.~> By upward flow of metal within treating zone {1}
211  DF  .~.~.~> Enclosed within casing

DEFINITION

Classification: 266/208

(under subclass 207) Device wherein the treating atmosphere is at a pressure less than standard atmospheric.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, for a process of treating a molten metal within a vacuum environment.

373, Industrial Electric Heating Furnaces,

54, 63, 110+, and 140+, for electric furnaces combined with means to lower the pressure therein to subatmospheric levels.