US PATENT SUBCLASS 8 / 677
.~.~.~ Heterocyclic group

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}
675  DF  .~.~ Anthraquinone dye {4}
677.~.~.~ Heterocyclic group

DEFINITION

Classification: 8/677

Heterocyclic group:

(under subclass 675) Subject matter wherein an anthraquinone dye contains a heterocyclic group (on the anthraquinone nucleus).