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 codeC03C3/321
Official title
Display labelChemistry & Metallurgy (mapped technology topic)
Total patents194

Filing trend

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

Filing activity over the last five years is declining.

Patents filed per year
YearPatents
201511
201612
201716
201830
201918
202018
202123
202221
202311
202416
202516
20262

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 C03C3/321?
CPC C03C3/321 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
How many patents are filed under CPC C03C3/321 (Chemistry & Metallurgy)?
Our database includes 194 publications tagged with this CPC code.
Is patent activity under CPC C03C3/321 growing?
Publication counts under this code: 16 in 2024 vs 16 in 2025 (latest complete years).