US PATENT SUBCLASS 549 / 407
.~.~.~.~.~.~.~ Chalcogen or nitrogen attached indirectly to the hetero ring by acyclic nonionic bonding

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}
356  DF  .~.~.~ The hetero ring is six-membered {9}
381  DF  .~.~.~.~ Polycyclo ring system having the hetero ring as one of the cyclos {4}
396  DF  .~.~.~.~.~ Bicyclo ring system having the hetero ring as one of the cyclos {2}
398  DF  .~.~.~.~.~.~ The bicyclo ring system consists of the hetero ring and a six-membered carbocyclic ring {6}
407.~.~.~.~.~.~.~ Chalcogen or nitrogen attached indirectly to the hetero ring by acyclic nonionic bonding

DEFINITION

Classification: 549/407

(under subclass 398) Compounds in which chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen is attached indirectly to the hetero ring by acyclic nonionic bonding.

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