Carbon-containing steel material and method for producing same
US-10793935-B2 · Oct 6, 2020 · US
Oxidising of ferrous surfaces
Oxidising of ferrous surfaces · 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 | C23C8/14 |
| Official title | Oxidising of ferrous surfaces |
| Display label | Oxidising of ferrous surfaces |
| Total patents | 147 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 13 |
| 2017 | 14 |
| 2018 | 10 |
| 2019 | 7 |
| 2020 | 18 |
| 2021 | 20 |
| 2022 | 18 |
| 2023 | 13 |
| 2024 | 12 |
| 2025 | 10 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Oil tempered wires
US-10760028-B2 · Sep 1, 2020 · US
Oxide film formed on surface of base material that is iron-based sintered body, sliding member on which oxide film is formed, and apparatus including sliding member
US-2020270541-A1 · Aug 27, 2020 · US
Black ferrite-based stainless steel sheet
US-2020232075-A1 · Jul 23, 2020 · US
Slide member, refrigerant compressor incorporating slide member, refrigerator and air conditioner
US-10704541-B2 · Jul 7, 2020 · US
Grain-oriented electrical steel sheet
US-2020126698-A1 · Apr 23, 2020 · US
Austenitic Alloy Material and Austenitic Alloy Pipe
US-2020087759-A1 · Mar 19, 2020 · US
Annealing separator composition for oriented electrical steel sheet, oriented electrical steel sheet, and method for manufacturing oriented electrical steel sheet
US-2019382860-A1 · Dec 19, 2019 · US
Surface treatment method of metallic materials
US-2019323102-A1 · Oct 24, 2019 · US
Heat resistant ferritic steel and method for producing the same
US-10385438-B2 · Aug 20, 2019 · US
Nanocrystal production method, and steel production method
US-2019249288-A1 · Aug 15, 2019 · US
Cast product having alumina barrier layer
US-2019136361-A1 · May 9, 2019 · US
Tube body that is to be used in high-temperature atmosphere and method for forming metal oxide layer on inner surface of tube body
US-2019127816-A1 · May 2, 2019 · US
Protective surface on stainless steel
US-2019100833-A1 · Apr 4, 2019 · US
Process of preparing a chemically pre-formed (cpf) iron negative electrode with oxidizing gases
US-2018375087-A1 · Dec 27, 2018 · US
Austenitic stainless steel sheet, cover member and production method for austenitic stainless steel sheet
US-2018363087-A1 · Dec 20, 2018 · US
Ferritic stainless steel foil
US-10151020-B2 · Dec 11, 2018 · US
Method for producing high-strength galvannealed steel sheets
US-10138530-B2 · Nov 27, 2018 · US
Clock screw and method for producing same
US-2018334736-A1 · Nov 22, 2018 · US
Process of preparing a chemically pre-formed (CPF) iron negative electrode with oxidizing gases
US-10069133-B2 · Sep 4, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23C8/14?
- CPC C23C8/14 is the Cooperative Patent Classification code for “Oxidising of ferrous surfaces.”
- How many patents are filed under CPC C23C8/14 (Oxidising of ferrous surfaces)?
- Our database includes 147 publications tagged with this CPC code.
- Is patent activity under CPC C23C8/14 growing?
- Publication counts under this code: 12 in 2024 vs 10 in 2025 (latest complete years).