US PATENT SUBCLASS 55 / 500
.~.~ Flexible sheet type maintained in nonplanar configuration

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}
500.~.~ Flexible sheet type maintained in nonplanar configuration

DEFINITION

Classification: 55/500

(under subclass 495) Apparatus having means to retain cohesive sheet-like material in a nonplanar configuration either in a frame or in a flow line.