US PATENT SUBCLASS 202 / 90
.~.~.~.~ Chamber externally heated

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

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
85  DF  .~.~ Thermolytic and autothermic {2}
88  DF  .~.~.~ Kiln and directly heated chamber {2}
90.~.~.~.~ Chamber externally heated

DEFINITION

Classification: 202/90

The chamber in which distillation is performed by the direct action of the heated gas is also heated externally, frequently by combustion of a part of the gas coming from the kiln.