Chemistry & Metallurgy

Chemistry & Metallurgy · 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 codeC01B25/45
Official title
Display labelChemistry & Metallurgy (mapped technology topic)
Total patents978

Filing trend

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

Filing activity over the last five years is rapidly growing.

Patents filed per year
YearPatents
2015101
201680
201784
201878
201954
202058
202151
202264
202387
2024139
2025150
202632

Representative patents

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

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Frequently asked questions

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

What is CPC C01B25/45?
CPC C01B25/45 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
How many patents are filed under CPC C01B25/45 (Chemistry & Metallurgy)?
Our database includes 978 publications tagged with this CPC code.
Is patent activity under CPC C01B25/45 growing?
Publication counts under this code: 139 in 2024 vs 150 in 2025 (latest complete years).