with transition metals other than titanium, zirconium or hafnium

with transition metals other than titanium, zirconium or hafnium · 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 codeC01B21/0615
Official title{with transition metals other than titanium, zirconium or hafnium}
Display labelwith transition metals other than titanium, zirconium or hafnium
Total patents28

Filing trend

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

Filing activity over the last five years is rapidly declining.

Patents filed per year
YearPatents
20154
20163
20171
20182
20193
20202
20216
20222
20231
20242
20252

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 C01B21/0615?
CPC C01B21/0615 is the Cooperative Patent Classification code for “with transition metals other than titanium, zirconium or hafnium.”
How many patents are filed under CPC C01B21/0615 (with transition metals other than titanium, zirconium or hafnium)?
Our database includes 28 publications tagged with this CPC code.
Is patent activity under CPC C01B21/0615 growing?
Publication counts under this code: 2 in 2024 vs 2 in 2025 (latest complete years).