US PATENT SUBCLASS 209 / 354
.~.~.~.~.~ Stepped

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

233  DF  SIFTING {16}
*  DD  .~ Plane sifters {2}
*  DD  .~.~ Horizontal and inclined {4}
352  DF  .~.~.~ Stationary {2}
353  DF  .~.~.~.~ Multiple {2}
354.~.~.~.~.~ Stepped

DEFINITION

Classification: 209/354

(under subclass 353) Pluralities of flat stationary horizontal or inclined sifters in stepped relation such that material has a drop in passing from one to another.

SEE OR SEARCH THIS CLASS, SUBCLASS:

151, for fluid suspension separators with stepped plane type material feeders.