(under the class definition) Apparatus for treating material under less than atmospheric pressure.
(1) Note. The enclosure may be heated or treating gas or vapor circulated and such operation, if carried out under less than atmospheric pressure, is not considered a plural operation for subclass 60.
(2) Note. The means must apply definite sub-atmospheric pressures and not merely cause the gas or vapor to flow onto or through the solids, for which see the appropriate type of apparatus.
(3) Note. For other apparatus or classes which may include vacuum treating, see search notes referencing this (3) Note.
SEE OR SEARCH THIS CLASS, SUBCLASS:
191, for means for causing a pulsating gas or vapor flow. 242, 402+ and 558, and see notes.
SEE OR SEARCH CLASS
15, Brushing, Scrubbing, and General Cleaning,
300.1+, for air blast and/or suction cleaning apparatus. (see (3) Note above.)
48, Gas: Heating and Illuminating,
89+, and 119+. (see (3) Note above.)
62, Refrigeration,
100, 169 and 268+ for processes and apparatus for refrigeration involving vacuumizing an open outlet chamber. (see (3) Note above.)
99, Foods and Beverages: Apparatus,
472,. (see (3) Note above.)
127, Sugar, Starch, and Carbohydrates,
16,. (see (3) Note above.) 128, Surgery,
204,. (see (3) Note above.)
141, Fluent Material Handling, With Receiver or Receiver Coating Means,
65+, for apparatus for merely evacuating and/or gas or vapor charging receivers. (see (3) Note above.)
159, Concentrating Evaporators,
3, 17 and 22+. (see (3) Note above.)
196, Mineral Oils: Apparatus, particularly
114, for apparatus adapted for distilling a mineral oil under reduced pressure. (see (3) Note above.)
198, Conveyors: Power-Driven,
803, for rotary transfer valves. (see (3) Note above.)
201, Distillation: Processes, Thermolytic,
35, for a process of carbonizing under less than atmospheric pressure. (see (3) Note above.)
202, Distillation: Apparatus, particularly
205,. (see (3) Note above.)
203, Distillation: Processes, Separatory,
74+, and 91+ for a process of distilling a liquid under less than atmospheric pressure. (see (3) Note above.)
220, Receptacles, appropriate subclass for receptacle structure. (see (3) Note above.)
373, Industrial Electric Heating Furnaces,
54, 63, 110+, and 140+. (see (3) Note above.)
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,
