US PATENT SUBCLASS 564 / 13
.~.~.~ The phosphorus and nitrogen are members of the same ring

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}
12  DF  .~.~ Phosphorus attached directly to amino nitrogen by nonionic bonding {2}
13.~.~.~ The phosphorus and nitrogen are members of the same ring

DEFINITION

Classification: 564/13

(under subclass 12) Compounds wherein the phosphorus and amino nitrogen are both members of the same ring.

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