Non-superficial impregnation or infiltration of the substrate

Non-superficial impregnation or infiltration of the substrate · 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 codeC04B41/457
Official title{Non-superficial impregnation or infiltration of the substrate}
Display labelNon-superficial impregnation or infiltration of the substrate
Total patents96

Filing trend

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

Filing activity over the last five years is rapidly growing.

Patents filed per year
YearPatents
20151
20169
20175
20186
20198
20207
20217
20225
202310
202417
202517
20264

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 C04B41/457?
CPC C04B41/457 is the Cooperative Patent Classification code for “Non-superficial impregnation or infiltration of the substrate.”
How many patents are filed under CPC C04B41/457 (Non-superficial impregnation or infiltration of the substrate)?
Our database includes 96 publications tagged with this CPC code.
Is patent activity under CPC C04B41/457 growing?
Publication counts under this code: 17 in 2024 vs 17 in 2025 (latest complete years).