US PATENT SUBCLASS 202 / 267.2
.~.~.~ Corrugated walls

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

81  DF  APPARATUS {4}
239  DF  .~ Elements {10}
267.1  DF  .~.~ Materials of construction {1}
267.2.~.~.~ Corrugated walls

DEFINITION

Classification: 202/267.2

Corrugate walls:

(under subclass 267.1) Subject matter wherein the walls of the structure display alternately ridges and groves or furrows.