US PATENT SUBCLASS 528 / 68
.~.~ With organic compound reactant containing at least two NH, HNH or =NH groups and wherein the reactant composition is devoid of -C-XH, -C(=X)XH or anhydride

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}
68.~.~ With organic compound reactant containing at least two NH, HNH or =NH groups and wherein the reactant composition is devoid of -C-XH, -C(=X)XH or anhydride

DEFINITION

Classification: 528/68

(under subclass 44) Subject matter wherein a compound having at least one -N=C=X (X is chalcogen) group is reacted with at least one compound which contains two or more NH, -NH2, or C=NH groups or a combination of two or more of these groups and wherein the NH, -NH2, or C=NH group-containing reactant plus any other reactant is devoid of any group.

(1) Note. In all cases each of the functional derivatives, i.e., NH, C=NH, -NH2, must be directly bonded to the same or different carbon atom. A

compound having a single carbon atom which is bonded to more would than one -NH2, >NH, or >C=NH group would meet the requirements of this subclass.