US PATENT SUBCLASS 202 / 178
.~.~.~.~.~.~ Straining

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  DF  .~.~.~.~.~ Preheater {3}
178.~.~.~.~.~.~ Straining

DEFINITION

Classification: 202/178

The preheater has a straining device.