US PATENT SUBCLASS 210 / 500.43
.~.~.~.~.~ Acrylonitrile

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}
500.42  DF  .~.~.~.~ Vinyl {1}
500.43.~.~.~.~.~ Acrylonitrile

DEFINITION

Classification: 210/500.43

Acrylonitrile:

(under subclass 500.42) Subject matter comprisiang a CH2 = CH-C=N group.

(1) Note. When polyacrylonitrile resins are present, various of the hydrogen atoms may be replaced by other atoms.