US PATENT SUBCLASS 165 / 301
.~ Liquid-level responsive or control means

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

200  DF  WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14}
301.~ Liquid-level responsive or control means {1}
302  DF  .~.~> Condenser or evaporator

DEFINITION

Classification: 165/301

Liquid-level responsive or control means:

(under subclass 200) Subject matter wherein said instrument senses and reacts to the height of liquid contained in a liquid holder or regulates said height.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

451+, for automatic control of feeders.

137, Fluid Handling,

11, for processes related to regulating boiler feed water level.