Surface-treated steel sheet
US-2024044013-A1 · Feb 8, 2024 · US
Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals · 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 | C23C22/00 |
| Official title | Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals |
| Display label | Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals |
| Total patents | 272 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 15 |
| 2017 | 13 |
| 2018 | 30 |
| 2019 | 20 |
| 2020 | 34 |
| 2021 | 23 |
| 2022 | 41 |
| 2023 | 17 |
| 2024 | 26 |
| 2025 | 37 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Treatment solution for chromium-free tension coating, method for forming chromium-free tension coating, and grain oriented electrical steel sheet with chromium-free tension coating
US-2018371621-A1 · Dec 27, 2018 · US
Treatment solution for chromium-free tension coating, method for forming chromium-free tension coating, and grain oriented electrical steel sheet with chromium-free tension coating
US-2018371620-A1 · Dec 27, 2018 · US
Zinc-based plated steel sheet having post-treated coating formed thereon and post-treatment method therefor
US-2018363119-A1 · Dec 20, 2018 · US
Packaging material for power storage devices, and method of producing packaging material for power storage devices
US-2018366693-A1 · Dec 20, 2018 · US
Handheld mobile device with hidden antenna formed of metal injection molded substrate
US-10158164-B2 · Dec 18, 2018 · US
Substrate for photoelectric conversion element
US-2018358565-A1 · Dec 13, 2018 · US
Aluminium Alloy Strip for Adhesive Connection
US-2018347067-A1 · Dec 6, 2018 · US
Grain-oriented electrical steel sheet and decarburized steel sheet used for manufacturing the same
US-2018305784-A1 · Oct 25, 2018 · US
Lithium cell electrode using surface-modified copper foil current collector
US-2018287164-A1 · Oct 4, 2018 · US
Treatment solution for chromium-free tension coating, method for forming chromium-free tension coating, and grain oriented electrical steel sheet with chromium-free tension coating
US-10087529-B2 · Oct 2, 2018 · US
Systems and methods for modifying surfaces of substrates
US-2018265986-A1 · Sep 20, 2018 · US
Insulative coating processing liquid and method for manufacturing metal having insulative coating
US-2018251899-A1 · Sep 6, 2018 · US
Surface-treated copper foil
US-10070521-B2 · Sep 4, 2018 · US
Electrical steel sheet and manufacturing method thereof
US-2018240579-A1 · Aug 23, 2018 · US
Black coating film-forming vehicle component and/or fastening component, and manufacturing method thereof
US-10005104-B2 · Jun 26, 2018 · US
Threaded tubular element provided with a metallic anti-corrosion and anti-galling coating
US-2018172197-A1 · Jun 21, 2018 · US
Transmissive surfaces and polymeric coatings therefore, for fortification of visible, infrared, and laser optical devices
US-9982156-B1 · May 29, 2018 · US
Fixing band for constant-velocity universal joint boot
US-2018135668-A1 · May 17, 2018 · US
Heat transfer tube having rare-earth oxide superhydrophobic surface and method for manufacturing the same
US-2018135927-A1 · May 17, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23C22/00?
- CPC C23C22/00 is the Cooperative Patent Classification code for “Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals.”
- How many patents are filed under CPC C23C22/00 (Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals)?
- Our database includes 272 publications tagged with this CPC code.
- Is patent activity under CPC C23C22/00 growing?
- Publication counts under this code: 26 in 2024 vs 37 in 2025 (latest complete years).