US PATENT SUBCLASS 164 / 474
.~.~.~ Utilizing a vacuum


Current as of: June, 1999
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164 /   HD   METAL FOUNDING

1  DF  PROCESS {6}
47  DF  .~ Shaping liquid metal against a forming surface {26}
459  DF  .~.~ Continuous or semicontinuous casting {20}
474.~.~.~ Utilizing a vacuum


DEFINITION

Classification: 164/474

Utilizing a vacuum:

(under subclass 459) Process including exhausting air or other gases from the immediate contiguous environment of a casting material to a negative pressure differential with respect to the surrounding ambient environment of the casting material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.1+, for processes of applying a vacuum in a mold-forming operation.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures, appropriate subclasses for vacuum treatment of metals.

264, Plastic and Nonmetallic Article Shaping or Treating: Processes,

500+, for processes of vacuum forming plastic materials; and subclasses 101+ for processes of vacuum treating work.