US PATENT SUBCLASS 8 / 451
.~.~ Azo dye component ground

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

445  DF  PROCESS OF PRINTING PERMANENTLY ON SUBSTRATE, OTHER THAN NOMINAL PRINTING, USING PRINT PASTE CONTAINING DISCHARGE MATERIAL, RESIST MATERIAL, OR DYE MATERIAL; OR STENCIL DYEING {4}
446  DF  .~ Resist or reserve {10}
451.~.~ Azo dye component ground

DEFINITION

Classification: 8/451

Azo dye component ground:

(under subclass 446) Processes wherein an azo ground component of an azo dye is prevented from diazotization, coupling or other development in local areas.

SEE OR SEARCH THIS CLASS, SUBCLASS:

457+, for the discharge of azo dyes already formed on a substrate.

666+, for azo coupling on the fiber.