US PATENT SUBCLASS 209 / 281
.~.~ Stationary

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

233  DF  SIFTING {16}
274  DF  .~ Concave and convex sifters {3}
281.~.~ Stationary {2}
282  DF  .~.~.~> With reciprocating agitators
283  DF  .~.~.~> With rotating agitators

DEFINITION

Classification: 209/281

(under subclass 274) Stationary sifters the material-receiving surfaces of which are concave or convex.

SEE OR SEARCH THIS CLASS, SUBCLASS:

352+, for stationary horizontal or inclined plane sifter.