US PATENT SUBCLASS 528 / 85
.~.~ With reactant containing at least two -XH 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}
85.~.~ With reactant containing at least two -XH groups

DEFINITION

Classification: 528/85

(under subclass 44) Subject matter wherein a material containing two or more -N=C=X (X is chalcogen) groups is reacted with a compound having two or more -XH groups.

(1) Note. In all cases the -XH functional group must be bonded directly to a carbon atom. A compound having a single carbon atom bonded to two or more -XH groups would meet the requirements of this subclass. The carbon atom bonded to the -XH group cannot be double bonded to a chalcogen atom.