US PATENT SUBCLASS 514 / 109
.~.~ P-X-X containing (X is chalcogen)

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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}
109.~.~ P-X-X containing (X is chalcogen)

DEFINITION

Classification: 514/109

P-X-X containing (X is chalcogen):

(under subclass 75) Subject matter in which the organo-phosphorus compound has a single phosphorus atom linked directly to a chalcogen atom which in turn is linked directly to another chalcogen atom, e.g., as illustrated below, wherein X is Chalcogen. [figure] [caption], etc.