US PATENT SUBCLASS 514 / 456
.~.~.~.~.~ Bicyclo ring system having the hetero ring as one of the cyclos (e.g., chromones, etc.)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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.~.~.~.~.~ Bicyclo ring system having the hetero ring as one of the cyclos (e.g., chromones, etc.) {2}
457  DF  .~.~.~.~.~.~> Coumarins (including hydrogenated)
458  DF  .~.~.~.~.~.~> Tocopherols (e.g., vitamin E, etc.)

DEFINITION

Classification: 514/456

Bicyclo ring system having the hetero ring as one of the cyclos (e.g., chromones, etc.):

(under subclass 453) Subject matter wherein the polycyclo ring system consists of exactly two cyclos.