US PATENT SUBCLASS 210 / 457
.~ With central pervious tubular receiver


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

348  DF  FILTER {25}
457.~ With central pervious tubular receiver {1}
458  DF  .~.~> Plural concentric receivers


DEFINITION

Classification: 210/457

(under subclass 348) Apparatus in which there is a pervious member centrally located within a filter medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

437+, for a filter with a central liquid receiver, which filter is within a flow line or closed casing.

459+, for a filter attached to and extending beyond the end of a fluid conducting tube.