- 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: 43
10-year publication summary
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0
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4
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4
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2
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1
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3
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4
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1
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1
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| H.e.f. | 124 |
5 |
| Hydromecanique et Frottement | 94 |
4 |
| Caterpillar Inc. | 9166 |
3 |
| Aktiebolaget SKF | 2839 |
3 |
| NTN Corporation | 4976 |
2 |
| Dk-lok Corporation | 16 |
2 |
| MAHLE International GmbH | 2705 |
2 |
| Nihon Parkerizing Co., Ltd. | 280 |
2 |
| Nippon Steel Corporation | 6012 |
2 |
| Varel Mining and Industrial LLC | 8 |
2 |
| Honda Motor Co., Ltd. | 24866 |
1 |
| GM Global Technology Operations LLC | 14260 |
1 |
| Applied Nano Surfaces Sweden AB | 7 |
1 |
| Durferrit GmbH | 39 |
1 |
| Frank's International, LLC | 239 |
1 |
| Kolene Corporation | 38 |
1 |
| Lodge Manufacturing Company | 74 |
1 |
| Miba Sinter Austria GmbH | 100 |
1 |
| Neturen Co., Ltd. | 194 |
1 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
1 |
| Other owners | 6 |