US PATENT SUBCLASS 430 / 58.5
.~.~.~.~.~ Nitrogen hetero ring compound

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}
57.1  DF  .~.~ Having plural conductive layers {2}
58.05  DF  .~.~.~ Charge transport layer {8}
58.35  DF  .~.~.~.~ Organic nitrogen in charge transport layer {3}
58.5.~.~.~.~.~ Nitrogen hetero ring compound {2}
58.55  DF  .~.~.~.~.~.~> Pyrazole containing (e.g., including hydrogenated pyrazole, etc.)
58.6  DF  .~.~.~.~.~.~> Carbazole containing or derivative

DEFINITION

Classification: 430/58.5

Nitrogen hetero ring compound:

(under subclass 58.35) Subject matter wherein the charge transport layer contains a compound having a nitrogen-containing hetero ring (i.e. nitrogen is in a ring which may contain more than one hetero atom), e.g., oxazoles, oxadiazoles, triazoles, phthalocyanines, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75-82, for compositions containing nitrogen containing hetero rings.