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 codeC07C45/28
Official title
Display labelChemistry & Metallurgy (mapped technology topic)
Total patents146

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
201518
201610
201724
201821
20198
20206
20218
202213
202316
202411
20256
20265

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 C07C45/28?
CPC C07C45/28 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
How many patents are filed under CPC C07C45/28 (Chemistry & Metallurgy)?
Our database includes 146 publications tagged with this CPC code.
Is patent activity under CPC C07C45/28 growing?
Publication counts under this code: 11 in 2024 vs 6 in 2025 (latest complete years).