US PATENT SUBCLASS 210 / 274
.~.~ Including means to apply gas to bed

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

263  DF  PARTICULATE MATERIAL TYPE SEPARATOR, E.G., ION EXCHANGE OR SAND BED {13}
269  DF  .~ With rehabilitation means {6}
274.~.~ Including means to apply gas to bed

DEFINITION

Classification: 210/274

(under subclass 269) Apparatus comprising means to introduce gas into the separating medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

198.1, for a separator with means to add a treating fluid, particularly subclasses 220+ for a separator with submerged fluid inlet.