US PATENT SUBCLASS 8 / 653
.~.~ Indigoid 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}
650  DF  .~ Sulfur dye or vat dye {3}
653.~.~ Indigoid dye

DEFINITION

Classification: 8/653

Indigoid dye:

(under subclass 650) Subject matter employing natural or synthetic indigo and its derivatives or analogs (e.g., thioindigo) and which contain essentially the group -C(=0)-C=C-C(=0)- or its isomers or products converted to the same in dyeing.

SEE OR SEARCH CLASS

548, Organic Compounds,

450, 457 459, 464, and 488 for indigoid dye compounds.

549, Organic Compounds,

45, and 52 for thioloindigoid dye compounds.