US PATENT SUBCLASS 549 / 211
.~.~.~.~.~ The chalcogen, X, is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

Current as of: June, 1999
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549 /   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) {2}
200  DF  .~.~ Oxygen containing hetero ring (e.g., dioxirane, etc.) {16}
206  DF  .~.~.~ Heavy metal or aluminum containing {5}
210  DF  .~.~.~.~ The metal is bonded directly to chalcogen, which chalcogen is attached directly or indirectly to the hetero ring by nonionic bonding {1}
211.~.~.~.~.~ The chalcogen, X, is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

DEFINITION

Classification: 549/211

(under subclass 210) Compounds in which the chalcogen, X, is part of a --X- group, wherein the X's are the same or diverse chalcogens.

(1) Note. These compounds are usually referred to as "salts".

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