US PATENT SUBCLASS 544 / 207
.~.~.~.~.~.~.~.~ Hetero ring

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}
194  DF  .~.~.~.~ Substituent nitrogen bonded directly to carbon of the triazine ring {5}
204  DF  .~.~.~.~.~ Two substituent nitrogens bonded directly to two carbons of the triazine ring {3}
205  DF  .~.~.~.~.~.~ Guanamines {1}
206  DF  .~.~.~.~.~.~.~ Additional ring containing {1}
207.~.~.~.~.~.~.~.~ Hetero ring

DEFINITION

Classification: 544/207

(under subclass 206) Compounds wherein the additional ring is a hetero ring.

(1) Note. This subclass contains, for example, diguanamines.

(2) Note. There must be at least four ring hetero atoms in the molecule to be classified here.