US PATENT SUBCLASS 514 / 453
.~.~.~.~ Polycyclo ring system having the hetero ring as one of the cyclos

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  DF  .~.~.~ The hetero ring is six-membered {4}
453.~.~.~.~ Polycyclo ring system having the hetero ring as one of the cyclos {2}
454  DF  .~.~.~.~.~> Tricyclo ring system having the hetero ring as one of the cyclos {1}
456  DF  .~.~.~.~.~> Bicyclo ring system having the hetero ring as one of the cyclos (e.g., chromones, etc.) {2}

DEFINITION

Classification: 514/453

Polycyclo ring system having the hetero ring as one of the cyclos:

(under subclass 451) Subject matter wherein the six-membered hetero ring is one of the cyclos of a polycyclo ring system.