US PATENT SUBCLASS 8 / 648
.~ Fluorescent dye, e.g., stilbene, benzimidazole, benzoxazole, benzothiazole, pyrazoline dye, etc., optical brightner or bluing agent

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}
648.~ Fluorescent dye, e.g., stilbene, benzimidazole, benzoxazole, benzothiazole, pyrazoline dye, etc., optical brightner or bluing agent

DEFINITION

Classification: 8/648

Fluorescent dye, e.g., stilbene, benzimidazole, benzoxazole, benzothiazole, pyrazoline dye, etc., optical brightener or bluing agent:

(under subclass 636) Subject matter containing a fluorescent dye, e.g., stilbene, benzimidazole, benzoxazole, benzothiazole, pyrazoline dye, etc., bluing agents, or optical brighteners applied as dyes.

(1) Note. Methods of applying optical brighteners in the same manner as a dye are here. Where the optical brightener functions as a pigment the method goes in subclass 427.

SEE OR SEARCH THIS CLASS, SUBCLASS:

137, for methods of laundering involving a bluing step.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic, particularly

206.1+, and 238 for bluing sizes.

252, Compositions, 301.21+, for optical brightener composition.

427, Coating Processes,

157+, for application of fluorescent materials or optical brighteners as a pigment coating.