US PATENT SUBCLASS 210 / 321.7
.~.~ Solid cleaning material (e.g., balls)

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

321.6  DF  CASING DIVIDED BY MEMBRANE INTO SECTIONS HAVING INLET(S) AND/OR OUTLET(S) {15}
321.69  DF  .~ With membrane cleaning or sterlizing means (other than by filter movement or rotating agitator) {1}
321.7.~.~ Solid cleaning material (e.g., balls)

DEFINITION

Classification: 210/321.7

Solid cleaning material (e.g., balls):

(under subclass 321.69) Apparatus wherein said means providing membrane cleaning or sterilizing includes a plurality of solid discrete object other than a rotating mechanical agitator, e.g., particles, granules, sponge balls, beads, etc., and means for moving said object, adjacent to and/or in contact with, a membrane, for cleaning or sterilizing said membrane.

SEE OR SEARCH THIS CLASS, SUBCLASS:

321.63, for apparatus including a rotating mechanical agitator.