US PATENT SUBCLASS 548 / 201
.~.~.~.~.~ The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

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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}
200  DF  .~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the thiazole ring {1}
201.~.~.~.~.~ The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

DEFINITION

Classification: 548/201

(under subclass 200) Compounds in which the is part of a X group, wherein the X's are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium).

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