US PATENT SUBCLASS 548 / 326.1
.~.~.~.~.~ The diazole ring is further unsubstituted (e.g., cyclic ethylene urea, etc.)

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

Internet Version by PATENTEC © 1999      Terms of Use


548 /   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) {4}
100  DF  .~.~ Hetero ring is five-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazoles, etc.) {18}
300.1  DF  .~.~.~ 1,3-diazoles (including hydrogenated) {9}
316.4  DF  .~.~.~.~ Chalcogen bonded directly to ring carbon of the diazole ring (e.g., N-vinyl-N, N'ethylene urea, etc.) {9}
326.1.~.~.~.~.~ The diazole ring is further unsubstituted (e.g., cyclic ethylene urea, etc.)

DEFINITION

Classification: 548/326.1

(under subclass 316.4) Compounds wherein the diazole ring is not substituted except for the chalcogen (i.e., oxygen, sulfur, selenium, or tellurium).

(1) Note. This subclass contains, for example: [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

316.4, for compounds containing alkyl substituted cyclic ethylene urea.