US PATENT SUBCLASS 209 / 164
.~.~.~.~.~ Processes

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.~.~.~.~.~ Processes {2}
165  DF  .~.~.~.~.~.~> Preferential
166  DF  .~.~.~.~.~.~> With modifying agents {1}

DEFINITION

Classification: 209/164

Processes under subclass in which bubbles are caused to attach to certain of the components of the material treated and not to others, and the bubbles with adhering material are floated on the liquid.

(1) Note. This subclass will include processes in which reagents may be employed for the purpose merely of chemically generating bubbles, but not those cases in which a reagent is employed for modifying the surface of particles of material, the surface tension of the liquid, or the nature of physical properties of the bubbles, which cases go to subclasses 166+ of this class.

SEE OR SEARCH THIS CLASS, SUBCLASS:

166+, (see (1) Note).

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.