US PATENT SUBCLASS 564 / 426
.~.~.~ 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}
305  DF  .~.~ Benzene ring containing {24}
426.~.~.~ Polycyclo ring system {2}
427  DF  .~.~.~.~> Tricyclo ring system
428  DF  .~.~.~.~> Bicyclo ring system {1}

DEFINITION

Classification: 564/426

(under subclass 305) Compounds which contains a polycyclo ring system.

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