US PATENT SUBCLASS 558 / 193
.~.~.~ Nitro bonded directly to 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}
190  DF  .~.~ Nitrogen attached indirectly to the phosphorus by nonionic bonding {3}
193.~.~.~ Nitro bonded directly to a benzene ring


DEFINITION

Classification: 558/193

(under subclass 190) Compounds in which a benzene ring is bonded directly to a nitro group.