US PATENT SUBCLASS 55 / 499
.~.~.~ With additional transversely arranged members

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

490  DF  WITH MEANS SECURING OR RETAINING SEPARATING MEDIA {7}
495  DF  .~ Unit or cohesive sheet-like media in flow line or frame {12}
497  DF  .~.~ Edge supporting or securing means for nonplanar sheet form filter (e.g., zigzag) {2}
499.~.~.~ With additional transversely arranged members

DEFINITION

Classification: 55/499

(under subclass 497) Apparatus provided with one or more members which are in facial contact with the sheet media and thus serve as upstream, or downstream supports regarding the flow of gas.