US PATENT SUBCLASS 430 / 76
.~.~.~ The hetero ring has at least nitrogen as a ring hetero atom

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}
75  DF  .~.~ Radiation-conductive composition contains hetero ring {1}
76.~.~.~ The hetero ring has at least nitrogen as a ring hetero atom {2}
77  DF  .~.~.~.~> Additional diverse ring hetero atom in the hetero ring
78  DF  .~.~.~.~> Polycyclo ring system having the hetero ring as one of the cyclo systems {1}

DEFINITION

Classification: 430/76

The hetero ring has at least nitrogen as a ring hetero atom:

(under subclass 75) Compositions wherein at least one hetero atom present is N atom.