- 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: 283
10-year publication summary
|
27
|
24
|
21
|
17
|
9
|
12
|
20
|
11
|
7
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NTN Corporation | 4973 |
44 |
| Nippon Steel & Sumitomo Metal Corporation | 1987 |
17 |
| Swagelok Company | 318 |
16 |
| Robert Bosch GmbH | 42984 |
10 |
| Nippon Steel Corporation | 6465 |
10 |
| Aktiebolaget SKF | 3005 |
9 |
| Honda Motor Co., Ltd. | 25769 |
7 |
| ECM Technologies | 29 |
7 |
| JFE Steel Corporation | 7012 |
7 |
| GM Global Technology Operations LLC | 15310 |
6 |
| JTEKT Corporation | 2520 |
6 |
| Aubert & Duval | 113 |
6 |
| Nihon Parkerizing Co., Ltd. | 292 |
6 |
| Peugeot Citroen Automobiles SA | 1739 |
4 |
| NSK Ltd. | 2807 |
3 |
| Akebono Brake Industry Co., Ltd. | 360 |
3 |
| Daido Steel Co., Ltd. | 273 |
3 |
| Miba Sinter Austria GmbH | 104 |
3 |
| Oerlikon Surface Solutions AG, Pfaffikon | 548 |
3 |
| Caterpillar Inc. | 9706 |
2 |
| Other owners | 111 |