US PATENT SUBCLASS 202 / 156
.~.~.~.~.~ Parallel

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}
153  DF  .~.~.~ Still and column {2}
155  DF  .~.~.~.~ Plural stills {1}
156.~.~.~.~.~ Parallel

DEFINITION

Classification: 202/156

The plurality of stills are so related that each delivers its vapor direct to the column or columns. The stills may be used alternatively as single stills or in groups.