US PATENT SUBCLASS 205 / 690
.~.~.~ Bleaching

Current as of: June, 1999
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205 /   HD   ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS

687  DF  ELECTROLYTIC MATERIAL TREATMENT (PRODUCT, PROCESS, AND ELECTROLYTE COMPOSITION) {8}
688  DF  .~ Organic {9}
689  DF  .~.~ Fibrous {5}
690.~.~.~ Bleaching

DEFINITION

Classification: 205/690

Bleaching:

(under subclass 689) Subject matter in which the fibrous material is treated to remove color or colored impurities, usually to make the fibrous material lighter or whiter in appearance.

SEE OR SEARCH THIS CLASS, SUBCLASS:

693, for electrolytic cleaning or refining of fibrous organic material which does not involve bleaching.

700, for electrolytic bleaching of nonfibrous organic material.

SEE OR SEARCH CLASS

8, Bleaching and Dyeing; Fluid Treatment and Chemical Modification of Textiles and Fibers,

101+, for bleaching, in general.