US PATENT SUBCLASS 8 / 658
.~.~ Acid dye form, e.g., with sulfonic acid group, etc.

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}
657  DF  .~ Basic dye, including diphenylmethane, triphenylmethane, xanthene, fluorene, methine, acridine, oxazine, phenazine, flavylium, naphthoperinone, quinophthalone, etc., group-containing {2}
658.~.~ Acid dye form, e.g., with sulfonic acid group, etc.

DEFINITION

Classification: 8/658

Acid dye form, e.g., with sulfonic acid group, etc.:

(under subclass 657) Subject matter wherein the basic dye contains an acid or salt group, e.g., sulfonate, etc.