US PATENT SUBCLASS 544 / 182
.~.~.~.~ Asymmetrical (e.g., 1, 2, 4-triazines, etc.)


Current as of: June, 1999
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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}
180  DF  .~.~.~ Triazines {11}
182.~.~.~.~ Asymmetrical (e.g., 1, 2, 4-triazines, etc.) {1}
183  DF  .~.~.~.~.~> Polycyclo ring system having the asymmetrical triazine ring as one of the cyclos {1}


DEFINITION

Classification: 544/182

(under subclass 180) Compounds in which two of the ring nitrogens of the six-membered hetero ring are bonded directly to each other.

(1) Note. Examples of compounds provided for herein are 1, 2, 3-triazine, often designated as vicinal triazine, and 1, 2, 4-triazine.