US PATENT SUBCLASS 210 / 321.77
.~.~ Pleated membrane

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}
321.72  DF  .~ Each section having inlet(s) and outlet(s) {5}
321.77.~.~ Pleated membrane

DEFINITION

Classification: 210/321.77

Pleated membrane:

(under subclass 321.72) Apparatus wherein said semipermeable membrane is pleated (i.e., folded back and forth).