- 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 8/40 - 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 liquids, e.g. salt baths, liquid suspensions
Patent holdings for IPC class C23C 8/40
Total number of patents in this class: 31
10-year publication summary
3
|
2
|
1
|
2
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5
|
3
|
3
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1
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1
|
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
|
---|---|---|
Atotech Deutschland GmbH | 586 |
2 |
Rockwood Lithium GmbH | 42 |
2 |
Smith & Nephew, Inc. | 2685 |
2 |
Siemens AG | 24990 |
1 |
Robert Bosch GmbH | 40953 |
1 |
GM Global Technology Operations LLC | 13620 |
1 |
Daikin Industries, Ltd. | 9495 |
1 |
Henkel AG & Co. KGaA | 10129 |
1 |
Purdue Research Foundation | 3277 |
1 |
Northwestern University | 3112 |
1 |
The Chugoku Electric Power Co., Inc. | 498 |
1 |
Dechema Gesellschaft fur Chemische Technik und Biotechnologie e.V. | 22 |
1 |
Durferrit GmbH | 39 |
1 |
Federal-Mogul Corporation | 362 |
1 |
Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung eingetragener Verein | 61 |
1 |
Hitachi-GE Nuclear Energy, Ltd. | 261 |
1 |
Namics Corporation | 393 |
1 |
Nibco Inc. | 219 |
1 |
Nihon Parkerizing Co., Ltd. | 274 |
1 |
Okuno Chemical Industries Co., Ltd. | 95 |
1 |
Other owners | 8 |