US PATENT SUBCLASS 8 / 189
.~.~.~ Heterocyclic nitrogen compound

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

115.51  DF  CHEMICAL MODIFICATION OF TEXTILES OR FIBERS OR PRODUCTS THEREOF {7}
116.1  DF  .~ Cellulose fibers {8}
181  DF  .~.~ Treatment with nitrogen-containing organic compound {6}
189.~.~.~ Heterocyclic nitrogen compound {2}
190  DF  .~.~.~.~> Triazine
191  DF  .~.~.~.~> Three-membered ring with two C and one N

DEFINITION

Classification: 8/189

(under subclass 181) Processes wherein the nitrogen-containing organic compound is heterocyclic, i.e., said compound consists of one or more carbon atoms covalently bonded in a closed ring with at least one atom of nitrogen.

(1) Note. The heterocyclic ring may include oxygen, sulfur, selenium or tellurium as other hetero atoms.

(2) Note. Nonnitrogenous heterocyclic compounds are not included herein but are classified elsewhere according to the organic nitrogen-containing moiety.