US PATENT SUBCLASS 514 / 241
.~.~ Hetero ring is six-membered consisting of three nitrogens and three carbon atoms

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514 /   HD   DRUG, BIO-AFFECTING AND BODY TREATING COMPOSITIONS

1  DF  DESIGNATED ORGANIC ACTIVE INGREDIENT CONTAINING (DOAI) {29}
183  DF  .~ Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., O,S,Se or Te) or nitrogen as the only ring hetero atoms DOAI {16}
241.~.~ Hetero ring is six-membered consisting of three nitrogens and three carbon atoms {4}
242  DF  .~.~.~> Asymmetrical (e.g., 1,2,4-triazine, etc.) {1}
244  DF  .~.~.~> Hexamethylenetetramines
245  DF  .~.~.~> Nitrogen bonded directly to ring carbon of the hetero ring
246  DF  .~.~.~> Polycyclo ring system having a 1,3,5-triazine as one of the cyclos

DEFINITION

Classification: 514/241

Hetero ring is six-membered consisting of three nitrogens and three carbon atoms:

(under subclass 183) Subject matter wherein the active ingredient contains a six-membered heterocyclic nucleus consisting of three nitrogen atoms and three carbon atoms.