US PATENT SUBCLASS 202 / 177
.~.~.~.~.~ Preheater

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

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
152  DF  .~.~ Separatory {3}
163  DF  .~.~.~ Still {13}
176  DF  .~.~.~.~ With distilland treating devices {2}
177.~.~.~.~.~ Preheater {3}
178  DF  .~.~.~.~.~.~> Straining
179  DF  .~.~.~.~.~.~> Dephlegmating
180  DF  .~.~.~.~.~.~> Condensing

DEFINITION

Classification: 202/177

Systems coming under the preceding subclass in which the distilland is preheated. The preheating may be with agitation and by the distilling residue.

SEE OR SEARCH THIS CLASS, SUBCLASS:

150,

SEE OR SEARCH CLASS

196, Mineral Oils: Apparatus,

134,.

201, Distillation: Processes, Thermolytic,

14+, and 32+, for a process directed to preheating a solid

carbonaceous distilland. 203, Distillation: Processes, Separatory,

22+, 88 and 90, for a process directed to preheating a distilland.

208, Mineral Oils: Processes and Products,

353, and 364+.