US PATENT SUBCLASS 210 / 807
.~.~ Utilizing particulate bed

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

600  DF  PROCESSES {14}
767  DF  .~ Separating {16}
807.~.~ Utilizing particulate bed

DEFINITION

Classification: 210/807

Utilizing particulate bed:

(under subclass 767) Process in which the filter medium is of the loose particulate material type, e.g., sand bed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

263+, for apparatus utilizing a bed of discrete particles.

616+, where there are living organisms supported on such particulates.

660+, when the particulate material is of the sorption or ion exchange type.

792+, for processes of separation through a particulate bed including rehabilitation of such bed.