Method for etching of metal
US-12506112-B2 · Dec 23, 2025 · US
by physical dissolution
by physical dissolution · 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 | C23F4/04 |
| Official title | by physical dissolution |
| Display label | by physical dissolution |
| Total patents | 54 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 16 |
| 2016 | 10 |
| 2017 | 9 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 1 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Systems and methods for preparing metal matrix composite substrates for subsequent treatment
US-2025313956-A1 · Oct 9, 2025 · US
Laser-induced structures for biomedical use
US-2025196254-A1 · Jun 19, 2025 · US
Method for manufacturing electrodes
US-2025189478-A1 · Jun 12, 2025 · US
Method for Etching of Metal
US-2023108117-A1 · Apr 6, 2023 · US
Surface treatment method and surface treatment system
US-2022274205-A1 · Sep 1, 2022 · US
Reconditioning of reactive process chamber components for reduced surface oxidation
US-2021265137-A1 · Aug 26, 2021 · US
Magnetic head including spin torque oscillator and manufacturing method for the same
US-10803888-B1 · Oct 13, 2020 · US
Metal member, composite of metal member and resin member, and production method therefor
US-10755998-B2 · Aug 25, 2020 · US
Pressure vessel liner venting via nanotextured surface
US-10677390-B2 · Jun 9, 2020 · US
Method for selective aluminide diffusion coating removal
US-10590800-B2 · Mar 17, 2020 · US
Water-leachable alloy-melt-swapping process and porous metal manufactured using the same
US-10538826-B2 · Jan 21, 2020 · US
Work piece including a sacrificial cover layer for laser drilling substrates
US-10435796-B2 · Oct 8, 2019 · US
Method for preparing three-dimensional porous graphene material
US-10378113-B2 · Aug 13, 2019 · US
Metal member, composite of metal member and resin member, and production method therefor
US-2019206761-A1 · Jul 4, 2019 · US
Pressure vessel liner venting via nanotextured surface
US-2018363853-A1 · Dec 20, 2018 · US
Pressure vessel liner venting via nanotextured surface
US-10088110-B2 · Oct 2, 2018 · US
Synthesis of three-dimensional graphene foam: use as supercapacitors
US-9929287-B2 · Mar 27, 2018 · US
Water-leachable alloy-melt-swapping process and porous metal manufactured using the same
US-2018057912-A1 · Mar 1, 2018 · US
Sacrificial cover layers for laser drilling substrates and methods thereof
US-2017335466-A1 · Nov 23, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23F4/04?
- CPC C23F4/04 is the Cooperative Patent Classification code for “by physical dissolution.”
- How many patents are filed under CPC C23F4/04 (by physical dissolution)?
- Our database includes 54 publications tagged with this CPC code.
- Is patent activity under CPC C23F4/04 growing?
- Publication counts under this code: 1 in 2023 vs 4 in 2025 (latest complete years).