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Trisazo or higher polyazo dyes

Trisazo or higher polyazo dyes · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

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CPC classification statistics
Metric	Value
CPC code	C09B33/18
Official title	Trisazo or higher polyazo dyes
Display label	Trisazo or higher polyazo dyes
Total patents	7

Year-over-year patent counts classified under this CPC code.

Filing activity appears to be declining based on the most recent years.

Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.