- 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 8/20 - Carburising
Patent holdings for IPC class C23C 8/20
Total number of patents in this class: 180
10-year publication summary
|
20
|
17
|
14
|
10
|
11
|
15
|
4
|
7
|
3
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| IHI Corporation | 3453 |
12 |
| IHI Machinery and Furnace Co., Ltd. | 79 |
9 |
| Swagelok Company | 318 |
9 |
| GreenIron H2 AB | 32 |
6 |
| ALD Vacuum Technologies GmbH | 138 |
5 |
| Sikorsky Aircraft Corporation | 1097 |
5 |
| Robert Bosch GmbH | 42826 |
4 |
| Dowa Thermotech Co., Ltd. | 48 |
4 |
| Nikko Kinzoku Co., Ltd. | 4 |
4 |
| Apple Inc. | 55640 |
3 |
| Toyota Motor Corporation | 33015 |
3 |
| BIOTRONIK AG | 425 |
3 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 4006 |
3 |
| Nippon Steel Corporation | 6396 |
3 |
| Toyo Aluminium Kabushiki Kaisha | 351 |
3 |
| Nissan Motor Co., Ltd. | 12572 |
2 |
| Aisin AW Co., Ltd. | 2319 |
2 |
| AB Sandvik Coromant | 248 |
2 |
| Aircraft Gear Corporation | 34 |
2 |
| ArcelorMittal | 2334 |
2 |
| Other owners | 94 |