US PATENT SUBCLASS 209 / 167
.~.~.~.~.~.~.~ Preferential

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  DF  .~.~.~ Buoyant material {2}
*  DD  .~.~.~.~ Bubbles {2}
164  DF  .~.~.~.~.~ Processes {2}
166  DF  .~.~.~.~.~.~ With modifying agents {1}
167.~.~.~.~.~.~.~ Preferential

DEFINITION

Classification: 209/167

(under subclass 166) Processes of bubble flotation of the type of the preceding subclass, employing reagents, in which the selection by the bubbles is between a plurality of constituents of which each is normally flotable, those of one kind being floated while others are not.

SEE OR SEARCH CLASS

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,

10+, for foam colloid systems or agents for such systems or making or stabilizing such systems or agents, subclasses 115+ for compositions for or subcombination compositions for or

breaking of or inhibiting of foam colloid systems; in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.