US PATENT SUBCLASS 8 / 666
.~.~ Azo developed on the fiber

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}
666.~.~ Azo developed on the fiber {5}
667  DF  .~.~.~> Nitroaromatic component
668  DF  .~.~.~> Pyrazolone component
669  DF  .~.~.~> Polyazo component
670  DF  .~.~.~> Heterocyclic component
671  DF  .~.~.~> Me-C(=O)-CH-C(=O)- group-containing

DEFINITION

Classification: 8/666

Azo developed on the fiber:

(under subclass 662) Subject matter wherein an azo dye is prepared on a fiber by a developer process involving either the application of the amine followed by the diazotization and coupling on the fibers or impregnation with either the diazo component or the coupling component followed by the other in either sequence.

(1) Note. Where the amine is also an azo dye that is further developed by diazotization on the material, it is also placed here and not in the direct dyeing subclasses.