US PATENT SUBCLASS 8 / 687
.~.~ Polyazo dye

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

636  DF  DYE OR POTENTIAL DYE COMPOSITION, ADDITIVE, TREATMENT, PROCESS, PRODUCT, OR ANCILLARY DYE OPERATION {12}
662  DF  .~ Azo, acridone, or quinone dye {15}
687.~.~ Polyazo dye

DEFINITION

Classification: 8/687

Polyazo dye:

(under subclass 662) Subject matter containing a polyazo dye.

(1) Note. A polyazo (disazo) dye is a dye containing more than one -N=N- group. Diazo does not mean polyazo.