US PATENT SUBCLASS 558 / 162
.~.~.~.~.~ Plural phosphori attached indirectly to each other by a benzene ring or by a chain which includes a benzene ring

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}
155  DF  .~.~ Plural phosphori attached directly or indirectly to each other by nonionic bonding {1}
156  DF  .~.~.~ Plural phosphorus ester groups {4}
161  DF  .~.~.~.~ Divalent chalcogen double bonded directly to pentavalent phosphorus {2}
162.~.~.~.~.~ Plural phosphori attached indirectly to each other by a benzene ring or by a chain which includes a benzene ring

DEFINITION

Classification: 558/162

(under subclass 161) Compound in which plural phosphori are attached indirectly to each other by a benzene ring or by a chain which includes a benzene ring.

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