US PATENT SUBCLASS 210 / 342
.~.~ One element within another

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

322  DF  PLURAL DISTINCT SEPARATORS {1}
323.1  DF  .~ Filters {10}
342.~.~ One element within another

DEFINITION

Classification: 210/342

(under subclass 323.1) Apparatus wherein the filter units are arranged one within another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315, for spaced diverse filters, one within another.

337+, for nested filter units arranged for series prefilt flow.