US PATENT SUBCLASS 564 / 452
.~.~ Plural alicyclic rings, which are not part of the same polycyclo ring system, or ring systems bonded directly to the same carbon

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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}
452.~.~ Plural alicyclic rings, which are not part of the same polycyclo ring system, or ring systems bonded directly to the same carbon

DEFINITION

Classification: 564/452

(under subclass 1) Compounds wherein two discrete alicyclic rings or ring systems are bonded directly to the same carbon.

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