US PATENT SUBCLASS 202 / 221
.~.~.~.~ Vertical

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}
221.~.~.~.~ Vertical

DEFINITION

Classification: 202/221

Retorts designed to be charged at the top and discharged at the bottom and to occupy the vertical position. The retort may be of ring shape and may have jalousie walls.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

165+, for apparatus for vapor contact with solids in which the material being treated is fed in at an elevated level and flows generally downward through the treating zone.