US PATENT SUBCLASS 8 / 534
.~ Polyacrylonitrile fiber

Current as of: June, 1999
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8 /   HD   BLEACHING AND DYEING; FLUID TREATMENT AND CHEMICAL MODIFICATION OF TEXTILES AND FIBERS

529  DF  MULTIPLE CHEMICALLY DIVERSE FIBERS OR FIBERS WITH DIFFERENT CROSS SECTION, PROCESS OF DYEING OR PRODUCT {5}
534.~ Polyacrylonitrile fiber

DEFINITION

Classification: 8/534

Polyacrylonitrile fiber:

(under subclass 529) Subject matter for dyeing a blend containing a fiber derived from acrylonitrile.

(1) Note. This subclass includes acid and basic modified polyacrylonitrile blends. The acid modified polyacrylonitrile usually is a polyacrylonitrile with additional pendant -SO3- or -COO- radicals as by copolymerizing acrylonitrile with a sulfonated monomer.