US PATENT SUBCLASS 514 / 470
.~.~.~.~.~.~ Chalcogen or nitrogen bonded directly to the hetero ring

Current as of: June, 1999
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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}
449  DF  .~.~ Oxygen containing hetero ring {4}
461  DF  .~.~.~ The hetero ring is five-membered {5}
468  DF  .~.~.~.~ Polycyclo ring system having the hetero ring as one of the cyclos {1}
469  DF  .~.~.~.~.~ Bicyclo ring system having the hetero ring as one of the cyclos {1}
470.~.~.~.~.~.~ Chalcogen or nitrogen bonded directly to the hetero ring

DEFINITION

Classification: 514/470

Chalcogen or nitrogen bonded directly to the hetero ring:

(under subclass 469) Subject matter wherein chalcogen or nitrogen is bonded directly to the hetero ring.