US PATENT SUBCLASS 210 / 313
.~.~.~.~ Valve controlled

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

294  DF  DIVERSE DISTINCT SEPARATORS {3}
295  DF  .~ Including a filter {5}
299  DF  .~.~ Including constituent trapping feature {10}
312  DF  .~.~.~ Sediment discharge means {1}
313.~.~.~.~ Valve controlled

DEFINITION

Classification: 210/313

(under subclass 312) Apparatus in which the drain means is controlled by a valve.

SEE OR SEARCH THIS CLASS, SUBCLASS:

109+, for automatic discharge of treated material.