US PATENT SUBCLASS 514 / 457
.~.~.~.~.~.~ Coumarins (including hydrogenated)

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  DF  .~.~.~.~ Polycyclo ring system having the hetero ring as one of the cyclos {2}
456  DF  .~.~.~.~.~ Bicyclo ring system having the hetero ring as one of the cyclos (e.g., chromones, etc.) {2}
457.~.~.~.~.~.~ Coumarins (including hydrogenated)

DEFINITION

Classification: 514/457

Coumarins (including hydrogenated):

(under subclass 456) Subject matter wherein the bicyclo ring system has the following structure, as illustrated below, or hydrogenated form thereof. [figure]