US PATENT SUBCLASS 55 / 487
.~.~ Differing mesh sizes

Current as of: June, 1999
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55 /   HD   GAS SEPARATION

482  DF  TWO OR MORE SEPARATORS (E.G., SPACED FILTERS IN FLOW LINE OR CASING) {5}
486  DF  .~ Plies or layers of different characteristics or orientation {3}
487.~.~ Differing mesh sizes

DEFINITION

Classification: 55/487

(under subclass 486) Apparatus in which the unlike characteristics relates to the size of flow passages in the members.