US PATENT SUBCLASS 209 / 170-- .~.~.~.~.~.~ Pneumatic

US PATENT SUBCLASS 209 / 170
.~.~.~.~.~.~ Pneumatic

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	DF	.~.~.~.~.~ Apparatus {2}
170		.~.~.~.~.~.~ Pneumatic

DEFINITION

Classification: 209/170

(under subclass 168) Devices limited to selective flotation by bubbles in which the gas forming the bubbles is delivered below the surface of the liquid.

(1) Note. The gas as delivered may include some liquid or reagent.

SEE OR SEARCH THIS CLASS, SUBCLASS:

168, for apparatus wherein a gas is generated chemically or electrolytically within the liquid as are also combinations involving structures or elements belonging to both this and the immediately preceding subclass.

SEE OR SEARCH CLASS

261, Gas and Liquid Contact Apparatus, appropriate subclasses, for gas and liquid contact apparatus, per se.

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.