- All sections
- C - Chemistrymetallurgy
- C23C - Coating metallic materialcoating material with metallic materialsurface treatment of metallic material by diffusion into the surface, by chemical conversion or substitutioncoating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
- C23C 8/18 - Oxidising of ferrous surfaces
Patent holdings for IPC class C23C 8/18
Total number of patents in this class: 109
10-year publication summary
|
15
|
6
|
12
|
7
|
7
|
9
|
6
|
8
|
5
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6195 |
14 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
7 |
| NOVA Chemicals (International) S.A. | 769 |
7 |
| Encell Technology, Inc. | 50 |
5 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10925 |
4 |
| JFE Steel Corporation | 6806 |
3 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 168 |
3 |
| POSCO | 2188 |
3 |
| Sumitomo Electric Industries, Ltd. | 15391 |
2 |
| Robert Bosch GmbH | 42596 |
2 |
| Hyundai Motor Company | 21795 |
2 |
| ArcelorMittal | 2254 |
2 |
| Hitachi-GE Nuclear Energy, Ltd. | 282 |
2 |
| Kubota Corporation | 3756 |
2 |
| Nisshin Steel Co., Ltd. | 394 |
2 |
| NSK Americas, Inc. | 34 |
2 |
| Osaka Gas Co., Ltd. | 314 |
2 |
| POSCO Co., Ltd. | 1558 |
2 |
| Regents of the University of Minnesota | 2687 |
2 |
| Liberty Performance Steels Limited | 4 |
2 |
| Other owners | 39 |