US PATENT SUBCLASS 55 / 322
.~.~.~.~ Serially spaced with at least one of other type intermediately positioned

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

315  DF  PLURAL SERIAL BASICALLY DIVERSE SEPARATING MEDIA {3}
318  DF  .~ Plural stages in unitary casing {2}
320  DF  .~.~ Deflector and fibrous, filamentary, particulate solids, or cohesive sheet filter type {6}
321  DF  .~.~.~ Multiple of one type in series of parallel in flow path {3}
322.~.~.~.~ Serially spaced with at least one of other type intermediately positioned

DEFINITION

Classification: 55/322

(under subclass 321) Apparatus in which one of the multiple similar or same basic type separators is positioned upstream and another downstream of one or more of a different type separator.