US PATENT SUBCLASS 8 / 540
.~ Quaternary ammonium, pyridino, or dialkylaminoalkyl

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

539  DF  SYNTHETIC FIBER PRODUCED FROM MATERIAL WHICH CONTAINS PENDANT -COO-, -(O=)S(=O)-O-, -O-(O=)P(=O)-O-, PYRIDINO, DIALKYLAMINOALKYL-, OR QUATERNARY AMMONIUM RADICAL, DYEING PROCESS OR PRODUCT {1}
540.~ Quaternary ammonium, pyridino, or dialkylaminoalkyl

DEFINITION

Classification: 8/540

Quaternary ammonium, pyridino, or dialkylaminoalkyl:

(under subclass 539) Subject matter wherein the fiber contains pendant quaternary ammonium, pyridino, or dialkylaminoalkyl groups.

(1) Note. The groups noted above provide basic fibers which are substantive to or dyed by sulfonated direct or acid dyes.