US PATENT SUBCLASS 562 / 812
.~.~ The phosphorus is in a ring

Current as of: June, 1999
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562 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {41}
808  DF  .~ Phosphorus halides (i.e., compounds having halogen attached directly to phosphorus by nonionic bonding) {6}
812.~.~ The phosphorus is in a ring

DEFINITION

Classification: 562/812

(under subclass 808) Compounds wherein the phosphorus is a member of a ring.

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