US PATENT SUBCLASS 210 / 500.29
.~.~.~.~.~ Cellulosic

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

348  DF  FILTER {25}
500.1  DF  .~ Material {6}
500.21  DF  .~.~ Semipermeable membrane {6}
500.27  DF  .~.~.~ Organic {7}
500.28  DF  .~.~.~.~ Cyclic {2}
500.29.~.~.~.~.~ Cellulosic {1}
500.3  DD  .~.~.~.~.~.~> Cellulose acetate {2}

DEFINITION

Classification: 210/500.29

Cellulosic:

(under subclass 500.28) Subject matter comprising the structure known as cellulose, or derivatives thereof in which the basic cellulose structure remains intact.