US PATENT SUBCLASS 202 / 108
.~.~.~.~ With direct heating

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

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
96  DF  .~.~ Thermolytic {5}
105  DF  .~.~.~ Retort {14}
108.~.~.~.~ With direct heating

DEFINITION

Classification: 202/108

The retort is also heated internally by direct contact of its contents with a heating medium.

SEE OR SEARCH CLASS

201, Distillation: Processes, Thermolytic,

10+, for a thermolytic distillation process including the step of heating the retort internally by direct contact with a heating medium and subclasses 36+ for passing an extraneous gas through the carbonizing zone.