US PATENT SUBCLASS 210 / 280
.~.~ With agitator

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}
280.~.~ With agitator

DEFINITION

Classification: 210/280

(under subclass 269) Apparatus in which means in provided for agitating the bed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

271+, for apparatus including bed surface traversing means which may also function as an agitator.

276, for a particulate bed separator with backwash means and agitator.

407+, for other types of filters with residue remover or agitators.