US PATENT SUBCLASS 202 / 210
.~.~.~ Heap

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


202 /   HD   DISTILLATION: APPARATUS

81  DF  APPARATUS {4}
*  DD  .~ Types {3}
*  DD  .~.~ Autothermic {5}
210.~.~.~ Heap

DEFINITION

Classification: 202/210

Arrangements of wood or other carbonaceous material in piles covered with material to exclude air, mainly used in charcoal burning.