- 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 8/26 - Nitriding of ferrous surfaces
Patent holdings for IPC class C23C 8/26
Total number of patents in this class: 557
10-year publication summary
|
63
|
59
|
42
|
35
|
41
|
32
|
33
|
20
|
22
|
19
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6334 |
39 |
| JFE Steel Corporation | 6916 |
24 |
| Robert Bosch GmbH | 42813 |
20 |
| Regents of the University of Minnesota | 2699 |
20 |
| NTN Corporation | 4970 |
18 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
15 |
| PARKER NETSUSHORI KOGYO Co., Ltd. | 35 |
14 |
| Swagelok Company | 318 |
12 |
| Denso Corporation | 24431 |
11 |
| Dowa Thermotech Co., Ltd. | 47 |
10 |
| ThyssenKrupp Rasselstein GmbH | 71 |
10 |
| Honda Motor Co., Ltd. | 25425 |
9 |
| Toyota Motor Corporation | 32788 |
9 |
| Hyundai Motor Company | 22257 |
9 |
| Hitachi, Ltd. | 15556 |
8 |
| Nihon Parkerizing Co., Ltd. | 289 |
7 |
| General Electric Company | 13845 |
6 |
| Kia Motors Corporation | 7751 |
6 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2877 |
6 |
| MAHLE International GmbH | 2784 |
6 |
| Other owners | 298 |