- All sections
- C - Chemistry; metallurgy
- C23C - Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating 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: 106
10-year publication summary
|
15
|
6
|
12
|
7
|
7
|
9
|
6
|
7
|
4
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 5991 |
13 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
7 |
| NOVA Chemicals (International) S.A. | 755 |
6 |
| Encell Technology, Inc. | 51 |
5 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10682 |
4 |
| JFE Steel Corporation | 6538 |
3 |
| Nippon Steel & Sumikin Stainless Steel Corporation | 169 |
3 |
| Nisshin Steel Co., Ltd. | 398 |
3 |
| POSCO | 2204 |
3 |
| Sumitomo Electric Industries, Ltd. | 14929 |
2 |
| Robert Bosch GmbH | 41717 |
2 |
| ArcelorMittal | 2052 |
2 |
| Hitachi-GE Nuclear Energy, Ltd. | 272 |
2 |
| Kubota Corporation | 3477 |
2 |
| NSK Americas, Inc. | 34 |
2 |
| Osaka Gas Co., Ltd. | 319 |
2 |
| POSCO Co., Ltd. | 1293 |
2 |
| Regents of the University of Minnesota | 2674 |
2 |
| Liberty Performance Steels Limited | 4 |
2 |
| Mannesmann Precision Tubes France | 2 |
2 |
| Other owners | 37 |