Transition metals

Transition metals · 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 codeC12N2500/20
Official titleTransition metals
Display labelTransition metals
Total patents180

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
20157
201618
201713
201811
20197
202012
202124
202240
202320
202418
202510

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 C12N2500/20?
CPC C12N2500/20 is the Cooperative Patent Classification code for “Transition metals.”
How many patents are filed under CPC C12N2500/20 (Transition metals)?
Our database includes 180 publications tagged with this CPC code.
Is patent activity under CPC C12N2500/20 growing?
Publication counts under this code: 18 in 2024 vs 10 in 2025 (latest complete years).