US PATENT SUBCLASS 549 / 501
.~.~.~.~.~.~.~ Additional chalcogen attached indirectly to the hetero ring by nonionic bonding

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
497  DF  .~.~.~.~ Chalcogen attached indirectly to the hetero ring by nonionic bonding {3}
498  DF  .~.~.~.~.~ The chalcogen, X, is in a -C(=X)- group {1}
499  DF  .~.~.~.~.~.~ The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens {2}
501.~.~.~.~.~.~.~ Additional chalcogen attached indirectly to the hetero ring by nonionic bonding

DEFINITION

Classification: 549/501

(under subclass 499) Compounds wherein an additional chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) is attached indirectly to the hetero ring by nonionic bonding.

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