Organic compounds (class 532, subclass 1) > Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen as the only ring hetero atoms (class 540, subclass 1) > Hetero ring is six-membered consisting of one nitrogen and five carbons > Polycyclo ring system having the six-membered hetero ring as one of the cyclos > Heptacyclo ring system having the six-membered hetero ring as one of the cyclos > Plural ring hetero atoms in the heptacyclo ring system > Ring carbon is shared by three of the cyclos (e.g., perylene tetracarboxylic acid diimide, etc.) > Patents - Class: 546/37, Page: 4

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Class Information
Number: 546/37
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) or nitrogen as the only ring hetero atoms (class 540, subclass 1) > Hetero ring is six-membered consisting of one nitrogen and five carbons > Polycyclo ring system having the six-membered hetero ring as one of the cyclos > Heptacyclo ring system having the six-membered hetero ring as one of the cyclos > Plural ring hetero atoms in the heptacyclo ring system > Ring carbon is shared by three of the cyclos (e.g., perylene tetracarboxylic acid diimide, etc.)
Description: Compounds wherein one ring carbon is a member of three of the cyclos in the heptacyclo ring system (i.e., peri-fusion).

Patents under this class:

1 2 3 4

Patent Number	Title Of Patent	Date Issued
3935226	Substituted phenanthroline pigments	Jan. 27, 1976
3932415	Pyrylium dyes having a fused rigidized nitrogen-containing ring	Jan. 13, 1976

1 2 3 4

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