US PATENT SUBCLASS 209 / 486
.~.~.~ Permeable

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

422  DF  STRATIFIERS {6}
484  DF  .~ Elements {9}
485  DF  .~.~ Beds {1}
486.~.~.~ Permeable

DEFINITION

Classification: 209/486

(under subclass 485) Special or specific constructions of permeable or perforated supports on which material is stratified by fluid currents passed through the supports.