US PATENT SUBCLASS 202 / 223
.~.~.~.~.~ Wall

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

81  DF  APPARATUS {4}
*  DD  .~ Types {3}
*  DD  .~.~ Autothermic {5}
217  DF  .~.~.~ Retort {6}
222  DF  .~.~.~.~ Structural features {3}
223.~.~.~.~.~ Wall

DEFINITION

Classification: 202/223

Patents disclosing the structure of the retort, oven, or kiln walls.

SEE OR SEARCH CLASS

432, Heating,

247+, for the chamber structure of a residual, material heating furnace.