US PATENT SUBCLASS 202 / 232
.~.~.~ Still

Current as of: June, 1999
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202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
*  DD  .~ Types {3}
*  DD  .~.~ Separatory {1}
232.~.~.~ Still {6}
233  DF  .~.~.~.~> Directly and indirectly heated
234  DF  .~.~.~.~> Directly heated
235  DF  .~.~.~.~> Indirectly heated
236  DF  .~.~.~.~> Spray forming and filming
237  DF  .~.~.~.~> Tubular
238  DF  .~.~.~.~> Rotary and/or tiltable

DEFINITION

Classification: 202/232

This group of subclasses is restricted to the structure or

shape of the still itself and to the means associated therewith for heating it and other characteristic features of the still, apart from the system in which it is used.

SEE OR SEARCH CLASS

159, Concentrating Evaporators,

22, and subclasses 23-28.1+, indented thereunder.

165, Heat Exchange, appropriate subclasses, for means for modifying temperature not provided for in other classes and note "Search Class" under the class definition for related fields of search.

196, Mineral Oils: Apparatus,

104, and appropriate indented subclasses.