US PATENT SUBCLASS 8 / 408
.~.~.~ Plural dyes or dye and coupling agent

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

404  DF  DYEING INVOLVING ANIMAL-DERIVED NATURAL FIBER MATERIAL (OTHER THAN SOLELY WOOL OR SILK), E.G., LEATHER, FUR, HAIR, FEATHERS, ETC., COMPOSITION, PROCESS, OR PRODUCT {2}
405  DF  .~ Hair dyeing {7}
406  DF  .~.~ Oxidation dye {7}
408.~.~.~ Plural dyes or dye and coupling agent {2}
409  DF  .~.~.~.~> Heterocyclic amine dye
410  DF  .~.~.~.~> Paradiaminobenzene dye {2}

DEFINITION

Classification: 8/408

Plural dyes or dye and coupling agent:

(under subclass 406) Subject matter wherein more than one oxidation dye is used; or wherein an oxidation dye is used together with a coupling agent.

(1) Note. The coupling agents are generally phenols.

(2) Note. The reaction product of an aniline oxidation dye and a coupler may be an indoaniline, an indamine, or an idophenol. See subclasses 416 and 421 respectively, for these products.