US PATENT SUBCLASS 209 / 235
.~ Special applications

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

233  DF  SIFTING {16}
235.~ Special applications {2}
236  DF  .~.~> Distributing
237  DF  .~.~> Material testing

DEFINITION

Classification: 209/235

(under subclass 233) Sifting devices employed for separating particular materials or for other than the mere size grading of a given mass of particles.

SEE OR SEARCH THIS CLASS, SUBCLASS:

251, for reversible sifters.