US PATENT SUBCLASS 432 / 205
.~.~ Having pump, jet or valve means establishing chamber pressure distinct from ambient


Current as of: June, 1999
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432 /   HD   HEATING

120  DF  WORK CHAMBER HAVING HEATING MEANS {12}
200  DF  .~ Work chamber having gaseous material supply or removal structure {2}
205.~.~ Having pump, jet or valve means establishing chamber pressure distinct from ambient


DEFINITION

Classification: 432/205

(under subclass 200) Apparatus providing for the supply, removal, or maintanence of work atmosphere to establish a pressure in the work chamber substantially greater or less than atmospheric pressure.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

92, for a drier treating material in a vacuum chamber.

373, Industrial Electric Heating Furnaces,

54, 63, 110+, and 140+ for an electric furnace in which the material is heated under pressure or under a vacuum.