US PATENT SUBCLASS 549 / 431
.~.~.~.~.~ Three or more ring oxygens in the hetero ring (e.g., ozonides, etc.)

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}
429  DF  .~.~.~ The hetero ring is five-membered {14}
430  DF  .~.~.~.~ Plural ring oxygens in the hetero ring {8}
431.~.~.~.~.~ Three or more ring oxygens in the hetero ring (e.g., ozonides, etc.)

DEFINITION

Classification: 549/431

(under subclass 430) Compounds wherein the hetero ring contains at least three ring oxygens.

(1) Note. Ozonides are included herein. These products are usually formed by combining ozone with compounds containing a carbon-to-carbon multiple bond.