US PATENT SUBCLASS 544 / 406
.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the diazine ring


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

Internet Version by PATENTEC © 1999      Terms of Use



544 /   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) {1}
1  DF  .~.~ Hetero ring is six-membered having two or more ring hetero atoms of which at least one is nitrogen (e.g., selenazines, etc.) {6}
224  DF  .~.~.~ The six-membered hetero ring consists of two nitrogens and four carbons (e.g., 1,2-diazines, etc.) {9}
336  DF  .~.~.~.~ 1,4-diazines {9}
406.~.~.~.~.~ Having -C(=X)-, wherein X is chalcogen, bonded directly to the diazine ring {1}
407  DF  .~.~.~.~.~.~> Nitrogen attached directly to the diazine ring by nonionic bonding


DEFINITION

Classification: 544/406

Having -C(=X)-, wherein X is chalcogen, bonded directly to the diazine ring:

(under subclass 336) Compounds wherein a group, in which X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium), is bonded directly to the diazine ring.