US PATENT SUBCLASS 558 / 155
.~.~ Plural phosphori attached directly or indirectly to each other by nonionic bonding

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.~.~ Plural phosphori attached directly or indirectly to each other by nonionic bonding {1}
156  DF  .~.~.~> Plural phosphorus ester groups {4}

DEFINITION

Classification: 558/155

(under subclass 70) Compounds which contain two or more phosphori attached indirectly to each other by nonionic bonding.

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

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