US PATENT SUBCLASS 514 / 90
.~.~.~.~ Chalcogen in the six-membered hetero ring

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}
75  DF  .~ Phosphorus containing other than solely as part of an inorganic ion in an addition salt DOAI {22}
79  DF  .~.~ Nitrogen containing hetero ring {6}
89  DF  .~.~.~ Hetero ring is six-membered and includes only one ring nitrogen {1}
90.~.~.~.~ Chalcogen in the six-membered hetero ring

DEFINITION

Classification: 514/90

Chalcogen in the six-membered hetero ring:

(under subclass 89) Subject matter in which the organo-phosphorus compound contains a six-membered heterocyclic ring which also contains a chalcogen atom as well as the nitrogen, e.g., [figure] [caption], etc.