US PATENT SUBCLASS 202 / 256
.~.~.~.~ Valved

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

81  DF  APPARATUS {4}
239  DF  .~ Elements {10}
254  DF  .~.~ Offtakes {6}
255  DF  .~.~.~ Dip pipes and mains {1}
256.~.~.~.~ Valved

DEFINITION

Classification: 202/256

Dip pipes having valves for closing the pipe or by-passing the seal.