US PATENT SUBCLASS 514 / 146
.~.~.~.~ Two benzene rings bonded directly to 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}
75  DF  .~ Phosphorus containing other than solely as part of an inorganic ion in an addition salt DOAI {22}
143  DF  .~.~ Ester of (HX)P=X(XH)(XH) (X is chalcogen) (e.g., phosphate, etc.) {2}
144  DF  .~.~.~ Triester {3}
146.~.~.~.~ Two benzene rings bonded directly to chalcogen

DEFINITION

Classification: 514/146

Two benzene rings bonded directly to chalcogen:

(under subclass 144) Subject matter wherein the organo-phosphorus compound has at least two benzene rings attached directly to chalcogens which are bonded to a single phosphorus atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:

147, for the compound, illustrated below, which is considered to have only one benzene ring bonded to chalcogen which is bonded directly to phosphorus. [figure]