US PATENT SUBCLASS 548 / 194
.~.~.~.~.~.~ The chalcogen, X, is in a -C(=X)- group


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548 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
146  DF  .~.~.~ 1,3-thiazoles (including hydrogenated) {7}
190  DF  .~.~.~.~ Nitrogen attached directly to the thiazole ring by nonionic bonding {4}
193  DF  .~.~.~.~.~ Chalcogen attached indirectly to the thiazole ring by nonionic bonding {2}
194.~.~.~.~.~.~ The chalcogen, X, is in a -C(=X)- group {1}
195  DF  .~.~.~.~.~.~.~> The -C(=X)- group is bonded directly to the nitrogen {1}


DEFINITION

Classification: 548/194

(under subclass 193) Compounds in which the chalcogen, X (i.e., oxygen, sulfur, selenium, or tellurium), is in a group.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]