US PATENT SUBCLASS 209 / 19
.~ Gaseous suspension, 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}
19.~ Gaseous suspension, sifting, and stratifying

DEFINITION

Classification: 209/19

(under subclass 12.1) Methods and apparatus employing free suspension in gas, sifting and stratifying, for the assorting or segregation of components of a mixture of solids.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13, 14 and 44, for a combination including sifting and stratifying.

20, for a combination including gaseous suspension and stratifying.

21+, for a combination including gaseous suspension and sifting.

133+, for particulars of gaseous suspension separators.

233+, for particulars of sifters. 422+, for particulars of stratifiers.