US PATENT SUBCLASS 210 / 281
.~.~ With access opening to normally closed casing

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}
281.~.~ With access opening to normally closed casing

DEFINITION

Classification: 210/281

(under subclass 269) Apparatus wherein a closed casing which holds particulate material is provided with an opening through which the separatory material may be reached, or through which solid regenerating material may be inserted.

SEE OR SEARCH THIS CLASS, SUBCLASS:

268, for gravity flow of particulate material in a separator.