US PATENT SUBCLASS 564 / 16
.~.~.~ The phosphorus is a ring member

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37}
15  DF  .~.~ Phosphorus attached indirectly to amino nitrogen by nonionic bonding {1}
16.~.~.~ The phosphorus is a ring member

DEFINITION

Classification: 564/16

(under subclass 15) Compounds wherein the phosphorus is a member of a ring.

(1) Note. This subclass contains, for example: [figure] [figure]