US PATENT SUBCLASS 540 / 137
.~.~.~.~.~ At least eight halogens bonded directly to ring carbons of the phthalocyanine ring system

Current as of: June, 1999
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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}
136  DF  .~.~.~.~ Halogen bonded directly to ring carbon of the phthalocyanine ring system {2}
137.~.~.~.~.~ At least eight halogens bonded directly to ring carbons of the phthalocyanine ring system

DEFINITION

Classification: 540/137

(under subclass 136) Compounds wherein at least eight halogen (i.e., fluorine, chlorine, bromine, iodine, or astatine) atoms are bonded directly to ring carbons of the phthalocyanine ring system.