US PATENT SUBCLASS 514 / 451
.~.~.~ The hetero ring is six-membered


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}
451.~.~.~ The hetero ring is six-membered {4}
452  DF  .~.~.~.~> Plural ring oxygens in the hetero ring
453  DF  .~.~.~.~> Polycyclo ring system having the hetero ring as one of the cyclos {2}
459  DF  .~.~.~.~> Nitrogen containing
460  DF  .~.~.~.~> Chalcogen bonded directly to ring carbon of the hetero ring


DEFINITION

Classification: 514/451

The hetero ring is six-membered:

(under subclass 449) Subject matter wherein the hetero ring is six-membered.