Patent classifications
C
CHEMISTRY; METALLURGY
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C09
DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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C09B
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; , e.g. PIGMENTS; MORDANTS; LAKES
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5/00
Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
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C09B5/24
the heterocyclic rings being; only; condensed with an anthraquinone nucleus in 1-2 or 2-3 position
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