US PATENT SUBCLASS 528 / 61-- .~.~.~ With organic nitrogen reactant which contains two NH, =NH, or HNH groups

US PATENT SUBCLASS 528 / 61
.~.~.~ With organic nitrogen reactant which contains two NH, =NH, or HNH groups

Current as of: June, 1999
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528 /	HD	SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*	DD	SYNTHETIC RESINS (Class 520, Subclass 1) {23}
44	DF	.~ FROM REACTANT HAVING AT LEAST ONE -N=C=X GROUP (WHEREIN X IS A CHALCOGEN ATOM) AS WELL AS PRECURSORS THEREOF, E.G., BLOCKED ISOCYANATE, ETC. {17}
59	DF	.~.~ From N=C=X reactant having at least two -C-NH-C(=X)- groups {3}
61		.~.~.~ With organic nitrogen reactant which contains two NH, =NH, or HNH groups {3}
62	DF	.~.~.~.~> Organic NH, =NH, or HNH nitrogen-containing reactant contains a heterocyclic ring
63	DF	.~.~.~.~> Organic NH, =NH, HNH nitrogen reactant contains at least one halogen atom
64	DF	.~.~.~.~> Organic NH, =NH or HNH nitrogen reactant contains a carbocyclic or aromatic ring

DEFINITION

Classification: 528/61

(under subclass 59) Subject matter wherein a material containing at least one -N=C=X (X is chalcogen) group and two or more groups is reacted with a compound which contains two nitrogen atoms as -NH, -NH₂, or =NH groups or a combination thereof.

(1) Note. In all cases each of the functional derivatives (i.e., -NH, =NH, or -NH2) must be directly bonded to different carbon atoms or to the same carbon atom. A single compound having two functional groups bonded to a single carbon atom meets the requirements of this subclass.