- 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 8/32 - Carbo-nitriding of ferrous surfaces
Patent holdings for IPC class C23C 8/32
Total number of patents in this class: 286
10-year publication summary
|
25
|
22
|
18
|
9
|
13
|
22
|
12
|
7
|
4
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NTN Corporation | 4925 |
40 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
17 |
| Swagelok Company | 316 |
17 |
| Robert Bosch GmbH | 44327 |
10 |
| Nippon Steel Corporation | 6982 |
10 |
| Aktiebolaget SKF | 3156 |
9 |
| JFE Steel Corporation | 7632 |
9 |
| Honda Motor Co., Ltd. | 26309 |
7 |
| GM Global Technology Operations LLC | 16232 |
7 |
| Aubert & Duval | 109 |
7 |
| ECM Technologies | 36 |
7 |
| JTEKT Corporation | 2622 |
6 |
| Nihon Parkerizing Co., Ltd. | 297 |
5 |
| Oerlikon Surface Solutions AG, Pfaffikon | 558 |
4 |
| Peugeot Citroen Automobiles SA | 1643 |
4 |
| NSK Ltd. | 2845 |
3 |
| Akebono Brake Industry Co., Ltd. | 366 |
3 |
| Case Western Reserve University | 1907 |
3 |
| Daido Steel Co., Ltd. | 288 |
3 |
| Miba Sinter Austria GmbH | 101 |
3 |
| Other owners | 112 |