US PATENT SUBCLASS 540 / 124
.~.~.~.~.~ The hetero ring is six-membered having nitrogen as a ring member


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540 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS {6}
121  DF  .~.~ Azaporphyrins {1}
122  DF  .~.~.~ Phthalocyanines {8}
123  DF  .~.~.~.~ Hetero ring attached directly or indirectly to the phthalocyanine ring system by nonionic bonding {2}
124.~.~.~.~.~ The hetero ring is six-membered having nitrogen as a ring member {1}
125  DF  .~.~.~.~.~.~> Plural hetero atoms in the six-membered hetero ring {1}


DEFINITION

Classification: 540/124

(under subclass 123) Compounds in which the hetero ring is six-membered and contains nitrogen as a ring member.

(1) Note. An example of a compound provided for herein is seen in the structure below, wherein CuPc is a copper phthalocyanine radical. [figure]