US PATENT SUBCLASS 514 / 188
.~.~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons

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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}
184  DF  .~.~ Heavy metal containing (including salts) {4}
188.~.~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons

DEFINITION

Classification: 514/188

Hetero ring is six-membered consisting of one nitrogen and five carbons:

(under subclass 184) Subject matter wherein the heterocyclic ring consists of five carbons and one nitrogen.