US PATENT SUBCLASS 55 / 486
.~ Plies or layers of different characteristics or orientation

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.~ Plies or layers of different characteristics or orientation {3}
487  DF  .~.~> Differing mesh sizes
488  DF  .~.~> Variation in shape or size
489  DF  .~.~> Orientation of elements

DEFINITION

Classification: 55/486

(under subclass 482) Apparatus in which the media comprises facially contiguous elements or members of unlike material, mesh, screen and the like characteristics to define thereby functionally distinct members, or comprises like material differently oriented.

SEE OR SEARCH THIS CLASS, SUBCLASS:

522, for media comprised of facially contiguous elements of like characteristics and orientation.