US PATENT SUBCLASS 558 / 206
.~.~.~.~ The unsaturation is in 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}
203  DF  .~.~ Halogen attached indirectly to the phosphorus by acyclic nonionic bonding {2}
205  DF  .~.~.~ Carbon to carbon unsaturation containing {1}
206.~.~.~.~ The unsaturation is in a benzene ring


DEFINITION

Classification: 558/206

(under subclass 205) Compounds wherein the carbon to carbon unsaturation is in a benzene ring.

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