US PATENT SUBCLASS 549 / 217
.~.~.~.~ Oxirane ring containing

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}
216  DF  .~.~.~ Phosphorus bonded directly to the hetero ring {1}
217.~.~.~.~ Oxirane ring containing

DEFINITION

Classification: 549/217

(under subclass 216) Compounds which contain a three-membered ring consisting of one oxygen and two carbons, i.e., oxirane.

(1) Note. An example of a compound provided for herein is: [figure] [figure]