US PATENT SUBCLASS 514 / 448
.~.~.~.~ C=O bonded directly to the hetero ring (X is chalcogen)

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}
430  DF  .~.~ Sulfur containing hetero ring {3}
438  DF  .~.~.~ The hetero ring is five-membered {7}
448.~.~.~.~ C=O bonded directly to the hetero ring (X is chalcogen)

DEFINITION

Classification: 514/448

C=X bonded directly to the hetero ring (X is chalcogen):

(under subclass 438) Subject matter wherein C=X (X is chalcogen) is bonded directly to the hetero ring.