US PATENT SUBCLASS 564 / 458
.~.~.~ Polycyclo ring system

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}
457  DF  .~.~ Plural alicyclic rings {1}
458.~.~.~ Polycyclo ring system {2}
459  DF  .~.~.~.~> Tricyclo ring system
460  DF  .~.~.~.~> Bicyclo ring system

DEFINITION

Classification: 564/458

(under subclass 457) Compounds wherein the plural rings are

in the form of a polycyclo ring system.

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