US PATENT SUBCLASS 430 / 71
.~.~.~ Polycyclo ring system

Current as of: June, 1999
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430 /   HD   RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF

31  DF  ELECTRIC OR MAGNETIC IMAGERY, E.G., XEROGRAPHY, ELECTROGRAPHY, MAGNETOGRAPHY, ETC., PROCESS, COMPOSITION, OR PRODUCT {18}
56  DF  .~ Radiation-sensitive composition or product {10}
70  DF  .~.~ Radiation-conductive composition contains carbocyclic ring only {2}
71.~.~.~ Polycyclo ring system {1}
72  DF  .~.~.~.~> Substituted

DEFINITION

Classification: 430/71

Polycyclo ring system:

(under subclass 70) Compositions wherein the homocyclic ring containing compound, etc., is polycyclic with at least two rings having two carbon atoms in common, e.g., [figure]