US PATENT SUBCLASS 209 / 44
.~ Sifting and stratifying

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

12.1  DF  PLURAL, DIVERSE SEPARATING OPERATIONS {17}
44.~ Sifting and stratifying

DEFINITION

Classification: 209/44

(under subclass 12.1) Apparatus and methods employing both sifting and stratifying to segregate components of a mixture of solids.

(1) Note. Either or both may be wet or dry.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13, 14 and 19, for other combinations including both sifting and stratifying.

233+, for particulars of sifters.

422+, for particulars of stratifiers.