US PATENT SUBCLASS 570 / 183
.~.~.~.~ Polycyclo ring system

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
101  DF  .~ HALOGEN CONTAINING {21}
181  DF  .~.~ Product {3}
182  DF  .~.~.~ Benzene ring containing {3}
183.~.~.~.~ Polycyclo ring system

DEFINITION

Classification: 570/183

Polycyclo ring system:

(under subclass 182) Compound which contains two rings having two or more carbon atoms in common.

(1) Note. These systems are often referred to in the art as bridged (three or more atoms in common) or fused (two atoms in common).