Porosity of the layers

Porosity of the layers · 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 codeC25D5/623
Official title{Porosity of the layers}
Display labelPorosity of the layers
Total patents159

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
201512
201613
201715
201823
201921
202020
202120
20227
202312
20246
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 C25D5/623?
CPC C25D5/623 is the Cooperative Patent Classification code for “Porosity of the layers.”
How many patents are filed under CPC C25D5/623 (Porosity of the layers)?
Our database includes 159 publications tagged with this CPC code.
Is patent activity under CPC C25D5/623 growing?
Publication counts under this code: 6 in 2024 vs 10 in 2025 (latest complete years).