US PATENT SUBCLASS 202 / 167
.~.~.~.~ Still and feed-water heater

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

81  DF  APPARATUS {4}
82  DF  .~ Systems {6}
152  DF  .~.~ Separatory {3}
163  DF  .~.~.~ Still {13}
167.~.~.~.~ Still and feed-water heater

DEFINITION

Classification: 202/167

Associations of still and means for heating the water to be fed to a steam boiler.

SEE OR SEARCH CLASS

122, Liquid Heaters and Vaporizers,

441, and 442.

201, Distillation: Processes, Thermolytic,

13+, for a thermolytic distillation process in which heat in

the process is recovered by indirect heat exchange.

203, Distillation: Processes, Separatory,

21+, for a separatory distillation process in which heat in the process is recovered by indirect heat exchange and subclasses 10+, for a distillation process of purifying water.