US PATENT SUBCLASS 210 / 311
.~.~.~ Downflow inlet, upflow through filter medium

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}
311.~.~.~ Downflow inlet, upflow through filter medium

DEFINITION

Classification: 210/311

(under subclass 299) Apparatus in which entering liquid flows downwardly and then passes through the filter medium in an upward direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

305+, for filter and constituent trap means with a baffle preceding or within the sediment trap.

456, for a filter with a prefilt flow distributor or diverter.