US PATENT SUBCLASS 209 / 163
.~.~.~ Buoyant material


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

132  DF  FLUID SUSPENSION {2}
155  DF  .~ Liquid {5}
162  DF  .~.~ Floating {3}
163.~.~.~ Buoyant material {2}
*  DD  .~.~.~.~> Bubbles {2}
171  DF  .~.~.~.~> Oil


DEFINITION

Classification: 209/163

(under subclass 162) Methods and means wherein some material is caused to adhere selectively--i.e., to some constituents and not to others--which so lightens the material constituents to which it is attached as to cause them to float on the liquid, while the other constituents are not floated.