- 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 8/40 - Solid state diffusion of only non-metal elements into metallic material surfacesChemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
Patent holdings for IPC class C23C 8/40
Total number of patents in this class: 28
10-year publication summary
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2
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1
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2
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5
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3
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3
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1
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1
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0
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1
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Atotech Deutschland GmbH | 560 |
2 |
| Rockwood Lithium GmbH | 42 |
2 |
| Siemens AG | 24561 |
1 |
| Robert Bosch GmbH | 42450 |
1 |
| GM Global Technology Operations LLC | 14879 |
1 |
| Daikin Industries, Ltd. | 9957 |
1 |
| Henkel AG & Co. KGaA | 10451 |
1 |
| Purdue Research Foundation | 3564 |
1 |
| Northwestern University | 3364 |
1 |
| The Chugoku Electric Power Co., Inc. | 514 |
1 |
| Dechema Gesellschaft fur Chemische Technik und Biotechnologie e.V. | 21 |
1 |
| Durferrit GmbH | 39 |
1 |
| Federal-Mogul Corporation | 316 |
1 |
| Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung eingetragener Verein | 77 |
1 |
| Hitachi-GE Nuclear Energy, Ltd. | 281 |
1 |
| Namics Corporation | 438 |
1 |
| Nibco Inc. | 223 |
1 |
| Nihon Parkerizing Co., Ltd. | 283 |
1 |
| Okuno Chemical Industries Co., Ltd. | 98 |
1 |
| Peking University | 1288 |
1 |
| Other owners | 6 |