US PATENT SUBCLASS 558 / 148
.~.~.~.~ Of compounds having halogen attached directly to phosphorus 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}
87  DF  .~.~ Processes {19}
146  DF  .~.~.~ Purification or recovery {4}
148.~.~.~.~ Of compounds having halogen attached directly to phosphorus by nonionic bonding

DEFINITION

Classification: 558/148

(under subclass 146) Processes in which products having halogen attached directly to the phosphorus by nonionic bonding are purified or recovered.