US PATENT SUBCLASS 210 / 300
.~.~.~ Alternate filters and traps in series

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}
300.~.~.~ Alternate filters and traps in series {1}
301  DF  .~.~.~.~> Plural traps

DEFINITION

Classification: 210/300

(under subclass 299) Apparatus in which the liquid is passed through (1) at least two filter media, a constituent trap being positioned therebetween, or (2) at least two constituent traps with a filter medium therebetween.