US PATENT SUBCLASS 202 / 209
.~.~.~ Still retort

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

81  DF  APPARATUS {4}
*  DD  .~ Types {3}
*  DD  .~.~ Separatory and thermolytic {3}
209.~.~.~ Still retort

DEFINITION

Classification: 202/209

A chamber heated either externally or by internal tubes or furnace in such a way that first separatory, then thermolytic, distillation occurs.

(1) Note. The two heating stages here are distinct and do not refer to the periods of gradual increase in temperature involved in heating up a retort.