Piston ring having a wear protection layer containing particles, method for production and use
US-12504074-B2 · Dec 23, 2025 · US
Discontinuous layers, e.g. microcracked layers
Discontinuous layers, e.g. microcracked layers · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C25D5/625 |
| Official title | {Discontinuous layers, e.g. microcracked layers} |
| Display label | Discontinuous layers, e.g. microcracked layers |
| Total patents | 58 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 9 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 4 |
| 2022 | 8 |
| 2023 | 3 |
| 2024 | 3 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Piston ring with hard chromium layer and improved running-in behaviour
US-12442100-B2 · Oct 14, 2025 · US
Semiconductor material based on metal nanowires and porous nitride and preparation method thereof
US-12343711-B2 · Jul 1, 2025 · US
Composite materials
US-12241167-B2 · Mar 4, 2025 · US
Metal air filter
US-12194476-B2 · Jan 14, 2025 · US
Piston ring having a wear protection layer containing particles, method for production and use
US-2024384791-A1 · Nov 21, 2024 · US
CO2 reduction toward methane
US-11993857-B2 · May 28, 2024 · US
Plated product and method for producing same
US-11898263-B2 · Feb 13, 2024 · US
Piston ring with hard chromium layer and improved running-in behaviour
US-2023147997-A1 · May 11, 2023 · US
Co2 reduction toward methane
US-2023094781-A1 · Mar 30, 2023 · US
Composite Materials
US-2023055570-A1 · Feb 23, 2023 · US
CO2 reduction toward methane
US-11512399-B2 · Nov 29, 2022 · US
Metal air filter
US-2022371027-A1 · Nov 24, 2022 · US
Antimicrobial metal nanoparticle mesh air filter
US-11470892-B1 · Oct 18, 2022 · US
Plated product and method for producing same
US-2022136122-A1 · May 5, 2022 · US
Methods for electrodeposition
US-11306407-B2 · Apr 19, 2022 · US
Semiconductor material based on metal nanowires and porous nitride and preparation method thereof
US-2022088579-A1 · Mar 24, 2022 · US
Chrome-plated part and manufacturing method of the same
US-11248300-B2 · Feb 15, 2022 · US
Electroplating method
US-11236431-B2 · Feb 1, 2022 · US
Method for manufacturing ceramic electronic component
US-11120943-B2 · Sep 14, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25D5/625?
- CPC C25D5/625 is the Cooperative Patent Classification code for “Discontinuous layers, e.g. microcracked layers.”
- How many patents are filed under CPC C25D5/625 (Discontinuous layers, e.g. microcracked layers)?
- Our database includes 58 publications tagged with this CPC code.
- Is patent activity under CPC C25D5/625 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).