US PATENT SUBCLASS 202 / 92
.~.~.~ Open kiln

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

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
91  DF  .~.~ Autothermic {2}
92.~.~.~ Open kiln

DEFINITION

Classification: 202/92

The distilland is placed in a structure without a top or is piled upon the ground or upon a platform and heated by means of the combustion of a part or its substance.