US PATENT SUBCLASS 210 / 500.34
.~.~.~.~.~.~ Styrene

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}
500.33  DF  .~.~.~.~.~ Homocyclic {1}
500.34.~.~.~.~.~.~ Styrene

DEFINITION

Classification: 210/500.34

Styrene:

(under subclass 500.33) Subject matter comprising a six membered carbon ring having attached thereto a -CH=CH2 groups.