- 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 8/56 - Carbo-nitriding of ferrous surfaces
Patent holdings for IPC class C23C 8/56
Total number of patents in this class: 42
10-year publication summary
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4
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4
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2
|
1
|
3
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4
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2
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1
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2
|
1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hydromecanique et Frottement | 128 |
7 |
| H.e.f. | 113 |
5 |
| Aktiebolaget SKF | 3151 |
3 |
| NTN Corporation | 4923 |
2 |
| Dk-lok Corporation | 16 |
2 |
| MAHLE International GmbH | 2919 |
2 |
| Nippon Steel Corporation | 6969 |
2 |
| Varel Mining and Industrial LLC | 7 |
2 |
| Honda Motor Co., Ltd. | 26212 |
1 |
| Caterpillar Inc. | 10302 |
1 |
| Applied Nano Surfaces Sweden AB | 7 |
1 |
| Durferrit GmbH | 39 |
1 |
| Frank's International, LLC | 239 |
1 |
| Lodge Manufacturing Company | 67 |
1 |
| Miba Sinter Austria GmbH | 101 |
1 |
| Neturen Co., Ltd. | 198 |
1 |
| Nihon Parkerizing Co., Ltd. | 297 |
1 |
| Nippon Steel & Sumitomo Metal Corporation | 1981 |
1 |
| PARKER NETSUSHORI KOGYO Co., Ltd. | 36 |
1 |
| Scania CV AB | 2412 |
1 |
| Other owners | 5 |