- 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 8/20 - Carburising
Patent holdings for IPC class C23C 8/20
Total number of patents in this class: 184
10-year publication summary
13
|
20
|
18
|
14
|
11
|
12
|
18
|
4
|
7
|
0
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
IHI Corporation | 3268 |
12 |
IHI Machinery and Furnace Co., Ltd. | 79 |
9 |
Swagelok Company | 325 |
9 |
GreenIron H2 AB | 26 |
6 |
ALD Vacuum Technologies GmbH | 138 |
5 |
Dowa Thermotech Co., Ltd. | 41 |
5 |
Sikorsky Aircraft Corporation | 1150 |
5 |
Toyota Motor Corporation | 28582 |
4 |
Robert Bosch GmbH | 40953 |
4 |
Toyo Aluminium Kabushiki Kaisha | 357 |
4 |
Nikko Kinzoku Co., Ltd. | 4 |
4 |
Apple Inc. | 50209 |
3 |
BIOTRONIK AG | 387 |
3 |
L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3515 |
3 |
Nippon Steel Corporation | 5649 |
3 |
TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 13301 |
3 |
Honda Motor Co., Ltd. | 24537 |
2 |
Siemens AG | 24990 |
2 |
Nissan Motor Co., Ltd. | 12249 |
2 |
Aisin AW Co., Ltd. | 2430 |
2 |
Other owners | 94 |