including at least one metal alloy layer

including at least one metal alloy layer · 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 codeC23C28/021
Official title{including at least one metal alloy layer}
Display labelincluding at least one metal alloy layer
Total patents901

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
201562
201673
201760
201887
201978
202098
202192
202292
202384
202490
202562
202623

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 C23C28/021?
CPC C23C28/021 is the Cooperative Patent Classification code for “including at least one metal alloy layer.”
How many patents are filed under CPC C23C28/021 (including at least one metal alloy layer)?
Our database includes 901 publications tagged with this CPC code.
Is patent activity under CPC C23C28/021 growing?
Publication counts under this code: 90 in 2024 vs 62 in 2025 (latest complete years).