US PATENT SUBCLASS 558 / 211
.~.~.~.~.~ Benzene ring bonded directly to each of the three chalcogens


Current as of: June, 1999
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558 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {21}
70  DF  .~ Phosphorus esters (i.e., compounds having the phosphorus ester group, wherein trivalent or pentavalent phosphorus and carbon are bonded directly to the same divalent chalcogen, and wherein the carbon may be single bonded to any atom but may be multiple bonded only to carbon) {18}
207  DF  .~.~ Divalent chalcogen double bonded directly to the phosphorus {2}
208  DF  .~.~.~ And three divalent chalcogens single bonded directly to the phosphorus (e.g., trialkyl phosphates, etc.) {3}
210  DF  .~.~.~.~ Benzene ring bonded directly to one of the chalcogens {2}
211.~.~.~.~.~ Benzene ring bonded directly to each of the three chalcogens


DEFINITION

Classification: 558/211

(under subclass 210) Compounds wherein each of the three

single bonded chalcogens is bonded directly to a benzene ring.

(1) Note. An example of a compound provided for herein is: [figure]