US PATENT SUBCLASS 209 / 142
.~.~ Grading deposition

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

132  DF  FLUID SUSPENSION {2}
133  DF  .~ Gaseous {7}
142.~.~ Grading deposition {1}
143  DF  .~.~.~> With deflection {4}

DEFINITION

Classification: 209/142

(under subclass 133) Methods and means by which material suspended in gaseous media is collected in two or more grades or classes.

(1) Note. The preceding subclasses which involve fluid suspension and deposition should be searched.