US PATENT SUBCLASS 558 / 208
.~.~.~ And three divalent chalcogens single bonded directly to the phosphorus (e.g., trialkyl phosphates, etc.)

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.~.~.~ And three divalent chalcogens single bonded directly to the phosphorus (e.g., trialkyl phosphates, etc.) {3}
209  DF  .~.~.~.~> Alicyclic ring bonded directly to one of the chalcogens
210  DF  .~.~.~.~> Benzene ring bonded directly to one of the chalcogens {2}
213  DF  .~.~.~.~> Multiple bond between two acyclic carbons

DEFINITION

Classification: 558/208

(under subclass 207) Compounds wherein the phosphorus is single bonded directly to each of three divalent chalcogens, which may be the same or diverse.

(1) Note. Examples of compounds provided for herein are: [figure] [figure]