US PATENT SUBCLASS 528 / 84
.~.~ With reactant containing at least two -C-C(=X)-X 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}
84.~.~ With reactant containing at least two -C-C(=X)-X groups

DEFINITION

Classification: 528/84

(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 moregroups.

(1) Note. In all cases the functional group must be bonded directly to a carbon atom. A compound having a single carbon atom which is bonded to two or more groups would meet the requirements of this subclass.

(2) Note. For purposes of this subclass a compound having a group is considered as having twogroups and is considered proper for this subclass.