US PATENT SUBCLASS 261 / 64.3
.~.~.~ Pressure control

Current as of: June, 1999
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261 /   HD   GAS AND LIQUID CONTACT APPARATUS

19  DF  FLUID DISTRIBUTION {5}
38  DF  .~ Valved {8}
64.1  DF  .~.~ Gas inlet {5}
64.3.~.~.~ Pressure control

DEFINITION

Classification: 261/64.3

Pressure control:

(under subclass 64.1) Apparatus wherein the gas inlet valve is controlled by pressure responsive means.