US PATENT SUBCLASS 209 / 459
.~.~.~.~ Annular, circular or spiral

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

422  DF  STRATIFIERS {6}
*  DD  .~ With liquid treatment {3}
*  DD  .~.~ Stationary bed {3}
458  DF  .~.~.~ Chutes and tables {2}
459.~.~.~.~ Annular, circular or spiral

DEFINITION

Classification: 209/459

(under subclass 458) Stationary circular, annular, or spiral tables or chutes on which material with mingled, accompanying or added, liquid is treated, so that the heaviest constituents may settle as a stratum, while the lighter form relatively displaced strata or are carried away by the liquid.