US PATENT SUBCLASS 8 / 640
.~.~.~ With sulfur dye or vat 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}
638  DF  .~ Mixed dyes, noncomplexed {4}
639  DF  .~.~ Azo {2}
640.~.~.~ With sulfur dye or vat dye

DEFINITION

Classification: 8/640

With sulfur dye or vat dye:

(under subclass 639) Subject matter in which both an azo and a vat or sulfur dye are present.

(1) Note. See the Glossary for the definition of a vat dye and of a sulfur dye.