US PATENT SUBCLASS 8 / 664
.~.~ Stabilized or potential diazo compound

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}
664.~.~ Stabilized or potential diazo compound {1}
665  DF  .~.~.~> Nitrosamine or N-diazo

DEFINITION

Classification: 8/664

Stabilized or potential diazo compound:

(under subclass 662) Subject matter in which a diazo compound stabilized by admixture, or a stable derivative of a diazo compound or a compound easily converted to a diazo solution in the dyeing process is employed.

(1) Note. Includes such compositions as anti-diazo sulphonates.

(2) Note. Preparation and process for dyeing involving stable and stabilized amino compounds requiring diazotization with nitrite to convert the same to diazo compounds, are not included here but in an appropriate subclass under subclass 666.

SEE OR SEARCH THIS CLASS, SUBCLASS:

666, for preparation and processes for dyeing involving stable and stabilized amino compounds requiring diazotization with nitrite to convert the same to diazo compounds.

SEE OR SEARCH CLASS

534, Organic Compounds, 558, 565 for the compounds, per se.