US PATENT SUBCLASS 210 / 337
.~.~.~ Nested units

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}
335  DF  .~.~ In series for prefilt flow {3}
337.~.~.~ Nested units {1}
338  DF  .~.~.~.~> Concentric filter elements

DEFINITION

Classification: 210/337

(under subclass 335) Apparatus arranged in superimposed or nested relation, each unit being removable from the other.

SEE OR SEARCH THIS CLASS, SUBCLASS:

315, for diverse concentric spaced filters.

342, for concentric filter elements arranged for parallel flow.