US PATENT SUBCLASS 8 / 553
.~.~ Derived from vinyl pyrrolidone or vinyl pyridine

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

550  DF  ORGANIC ADDITIVE FOR DYE COMPOSITION, DYE COMPOSITION CONTAINING ORGANIC ADDITIVE, PROCESS OR PRODUCT; OTHER THAN EMULSIFIER, PH ADJUSTER OR STARCH OR GUM PRINT PASTE THICKENER {24}
552  DF  .~ Polymeric additive {5}
553.~.~ Derived from vinyl pyrrolidone or vinyl pyridine

DEFINITION

Classification: 8/553

Derived form vinyl pyrrolidone or vinyl pyridine:

(under subclass 552) Subject matter wherein the polymeric additive is a polymer derived from vinyl pyridine or vinyl pyrrolidone.