US PATENT SUBCLASS 209 / 168
.~.~.~.~.~ Apparatus

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}
168.~.~.~.~.~ Apparatus {2}
169  DF  .~.~.~.~.~.~> Agitating
170  DF  .~.~.~.~.~.~> Pneumatic

DEFINITION

Classification: 209/168

(under subclass 163) Apparatus for effecting selective separation by bubble flotation.

(1) Note. As indicated in connection with subclass 166, the distinction between Classes 261, Gas and Liquid Contact Apparatus, and 366, Agitating, and this subclass, is that this subclass includes apparatus limited by positive inclusion of the element or elements which complete the device as a flotation apparatus, whereas Class 261 and 366 include devices which effect contact between gas and liquid not limited to flotation.

SEE OR SEARCH CLASS

127, Sugar, Starch, and Carbohydrates, for apparatus employed in the manufacture of sugar, starch or carbohydrates.

204, Chemistry: Electrical and Wave Energy, for apparatus employed in purifying a liquid using electrical or wave energy.

210, Liquid Purification or Separation,

198+, for separators of that class combined with means to add treating materials, e.g., a gas, particularly subclasses 220+. 261, Gas and Liquid Contact Apparatus, appropriate subclasses. (see (1) Note).

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.