US PATENT SUBCLASS 209 / 36
.~.~.~ Vertical current

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

12.1  DF  PLURAL, DIVERSE SEPARATING OPERATIONS {17}
21  DF  .~ Gaseous suspension and sifting {2}
30  DF  .~.~ Successive {4}
36.~.~.~ Vertical current {1}
37  DF  .~.~.~.~> With deposition

DEFINITION

Classification: 209/36

(under subclass 30) Methods and means for successively sifting and subjecting the material to be separated to a vertically flowing current of gas or air.