- 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 8/50 - Nitriding of ferrous surfaces
Patent holdings for IPC class C23C 8/50
Total number of patents in this class: 93
10-year publication summary
|
1
|
8
|
7
|
4
|
8
|
5
|
2
|
2
|
5
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| JFE Steel Corporation | 7012 |
12 |
| Nihon Parkerizing Co., Ltd. | 291 |
9 |
| Hydromecanique et Frottement | 113 |
9 |
| Nippon Steel Corporation | 6452 |
5 |
| H.e.f. | 116 |
3 |
| Kabushiki Kaisha Riken | 292 |
3 |
| Regents of the University of Minnesota | 2723 |
3 |
| ThyssenKrupp Rasselstein GmbH | 71 |
3 |
| Toyota Motor Corporation | 33246 |
2 |
| GM Global Technology Operations LLC | 15281 |
2 |
| Caterpillar Inc. | 9686 |
2 |
| Whirlpool Corporation | 4454 |
2 |
| NTN Corporation | 4974 |
2 |
| Durferrit GmbH | 39 |
2 |
| Seiko Epson Corporation | 19675 |
1 |
| Nissan Motor Co., Ltd. | 12616 |
1 |
| Schaeffler Technologies GmbH & Co. KG | 846 |
1 |
| JTEKT Corporation | 2518 |
1 |
| CNK Co., Ltd. | 3 |
1 |
| Dk-lok Corporation | 16 |
1 |
| Other owners | 28 |