- All sections
- C - Chemistry; metallurgy
- C23C - Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general
- C23C 8/28 - Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical 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 gases more than one element being applied in one step
Patent holdings for IPC class C23C 8/28
Total number of patents in this class: 41
10-year publication summary
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3
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4
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6
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2
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3
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6
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1
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2
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0
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0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Apple Inc. | 50209 |
2 |
| GM Global Technology Operations LLC | 13620 |
2 |
| Danmarks Tekniske Universitet | 902 |
2 |
| Aquacare Europe B.V. | 7 |
2 |
| Centre National de La Recherche Scientifique | 9632 |
1 |
| Airbus Operations S.A.S. | 2407 |
1 |
| Sumitomo Electric Industries, Ltd. | 14131 |
1 |
| Hyundai Motor Company | 19021 |
1 |
| Kia Motors Corporation | 7946 |
1 |
| National Institute of Advanced Industrial Science and Technology | 3677 |
1 |
| Aktiebolaget SKF | 2700 |
1 |
| Central Research Institute of Electric Power Industry | 115 |
1 |
| Federal-Mogul Burscheid GmbH | 284 |
1 |
| Hard Technologies Pty Ltd | 2 |
1 |
| H.e.f. | 127 |
1 |
| Kirin Company, Limited | 18 |
1 |
| MAHLE International GmbH | 2670 |
1 |
| MAHLE Metal Leve S/A | 160 |
1 |
| Matheson Tri-Gas, Inc. | 74 |
1 |
| Nihon Parkerizing Co., Ltd. | 274 |
1 |
| Other owners | 17 |