US PATENT SUBCLASS 8 / 672
.~.~ Dye containing removable solubilizing group, e.g., lactam radical, etc., or the dye is oxidized to insolubilize

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}
672.~.~ Dye containing removable solubilizing group, e.g., lactam radical, etc., or the dye is oxidized to insolubilize

DEFINITION

Classification: 8/672

Dye containing removable solubilizing group, e.g., lactam radical, etc., or the dye is oxidized to insolubilize:

(under subclass 662) Subject matter in which an azo dye or derivative thereof is applied followed by a treatment to render the same insoluble, generally, by conversion to a more in soluble compound.

(1) Note. For example, conversion to a more insoluble compound may be by such processes as lactamizing or the splitting off of a solubilizing group or by oxidation.