US PATENT SUBCLASS 540 / 127
.~.~.~.~.~ The hetero ring is five-membered having plural hetero atoms, at least one of which is nitrogen


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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}
127.~.~.~.~.~ The hetero ring is five-membered having plural hetero atoms, at least one of which is nitrogen


DEFINITION

Classification: 540/127

(under subclass 123) Compounds in which the hetero ring is five-membered and has plural hetero atoms, at least one of which is nitrogen.

(1) Note. The structure below is an example of a compound provided for herein, wherein NiPc is a nickel phthalocyanine radical. [figure]