US PATENT SUBCLASS 562 / 19
.~.~ 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}
8  DF  .~ Phosphorus acids or salts thereof (i.e., compounds having -XH, wherein X is chalcogen, attached directly to phosphorus by nonionic bonding and wherein the hydrogen may be replaced by a substituted or unsubstituted ammonium or by a group IA or IIA light metal) {7}
19.~.~ The phosphorus is in a ring

DEFINITION

Classification: 562/19

(under subclass 8) Compounds in which the phosphorus is a ring member.

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