- 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 4/18 - After-treatment
Patent holdings for IPC class C23C 4/18
Total number of patents in this class: 644
10-year publication summary
78
|
64
|
65
|
73
|
61
|
48
|
39
|
34
|
47
|
11
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Rtx Corporation | 8674 |
39 |
General Electric Company | 18133 |
28 |
Tocalo Co., Ltd. | 94 |
21 |
Siemens AG | 24990 |
14 |
GE Infrastructure Technology, LLC | 5873 |
14 |
Caterpillar Inc. | 8877 |
11 |
Nippon Steel & Sumikin Hardfacing Co., Ltd. | 22 |
10 |
Federal-Mogul Burscheid GmbH | 284 |
9 |
Nippon Steel Corporation | 5649 |
9 |
Ford Global Technologies, LLC | 19702 |
7 |
Nissan Motor Co., Ltd. | 12249 |
7 |
Praxair S.T. Technology, Inc. | 133 |
7 |
Tenneco Inc | 274 |
7 |
Siemens Energy Global GmbH & Co. KG | 2775 |
7 |
Applied Materials, Inc. | 16587 |
6 |
Hamilton Sundstrand Corporation | 4525 |
6 |
Safran Aircraft Engines | 5739 |
6 |
The University of Liverpool | 281 |
6 |
Tokyo Electron Limited | 11599 |
5 |
Daimler AG | 3462 |
5 |
Other owners | 420 |