US PATENT SUBCLASS 528 / 76
.~.~ With ether or thioether compound containing at least two -C-X-C- 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.~.~ With ether or thioether compound containing at least two -C-X-C- groups {3}
77  DF  .~.~.~> Ether or thioether compound contains three or more -XH groups
78  DF  .~.~.~> Ether or thioether contains at least one nitrogen atom other than as a C NH, C=NH, or C-N(H)-H
79  DF  .~.~.~> Ether or thioether contains a carbocyclic or aromatic group

DEFINITION

Classification: 528/76

(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 or groups and wherein the carbon atoms bonded to oxygen or sulfur atom are not double bonded to any oxygen, selenium, or tellurium atom.

(1) Note. For purposes of this subclass a compound having the structure is considered as having two groups.