US PATENT SUBCLASS 8 / 690
.~.~ Five-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen

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}
690.~.~ Five-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen {2}
691  DF  .~.~.~> Thiazoles (including hydrogenated)
692  DF  .~.~.~> Diazoles or triazoles (including hydrogenated)

DEFINITION

Classification: 8/690

Five-membered hetero ring having two or more ring hetero atoms of which at least one is nitrogen:

(under subclass 662) Subject matter wherein the dye contains a five-membered hetero ring having two or more ring hetero atoms at least one of which is nitrogen.