US PATENT SUBCLASS 514 / 461
.~.~.~ The hetero ring is five-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}
461.~.~.~ The hetero ring is five-membered {5}
462  DF  .~.~.~.~> Spiro ring system
463  DF  .~.~.~.~> Plural ring oxygens in the hetero ring {2}
468  DF  .~.~.~.~> Polycyclo ring system having the hetero ring as one of the cyclos {1}
471  DF  .~.~.~.~> Nitrogen containing {1}
473  DF  .~.~.~.~> Chalcogen bonded directly to the hetero ring {1}


DEFINITION

Classification: 514/461

The hetero ring is five-membered:

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