Coumarine dyes

Coumarine dyes · Cooperative Patent Classification (CPC)

Chemical and metallurgical processes, compounds, and materials.

Related technology areas

Mapped technology topics for this CPC code.

CPC classification statistics
MetricValue
CPC codeC09B57/02
Official titleCoumarine dyes
Display labelCoumarine dyes
Total patents228

Filing trend

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

Filing activity over the last five years is stable.

Patents filed per year
YearPatents
201521
201618
201717
201831
201920
202018
202119
202222
202321
202415
202520
20266

Representative patents

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

Frequently asked questions

Answers are generated from the same data shown on this page.

What is CPC C09B57/02?
CPC C09B57/02 is the Cooperative Patent Classification code for “Coumarine dyes.”
How many patents are filed under CPC C09B57/02 (Coumarine dyes)?
Our database includes 228 publications tagged with this CPC code.
Is patent activity under CPC C09B57/02 growing?
Publication counts under this code: 15 in 2024 vs 20 in 2025 (latest complete years).