US PATENT SUBCLASS 528 / 77
.~.~.~ Ether or thioether compound contains three or more -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}
76  DF  .~.~ With ether or thioether compound containing at least two -C-X-C- groups {3}
77.~.~.~ Ether or thioether compound contains three or more -XH groups

DEFINITION

Classification: 528/77

(under subclass 76) Subject matter wherein the or reactant contains at least three -XH groups.

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

(2) Note. The carbon atom bonded to the -XH group cannot be double bonded to a chalcogen atom.