US PATENT SUBCLASS 210 / 221.2
.~.~.~.~ And gas injecting means other than by mechanical agitation

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

198.1  DF  WITH MEANS TO ADD TREATING MATERIAL {5}
209  DF  .~ Directly applied to separator {5}
220  DF  .~.~ Submerged fluid inlet {1}
221.1  DF  .~.~.~ With outlet at surface, e.g., froth flotation, etc. {1}
221.2.~.~.~.~ And gas injecting means other than by mechanical agitation

DEFINITION

Classification: 210/221.2

And gas injecting means other than by mechanical agitation:

(under subclass 221.1) Apparatus having means to produce a gas other than mechanical agitation.