- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/56 - Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.7% by weight of carbon
Patent holdings for IPC class C22C 38/56
Total number of patents in this class: 93
10-year publication summary
|
8
|
9
|
12
|
9
|
3
|
4
|
5
|
2
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 1927 |
5 |
| ArcelorMittal | 2517 |
4 |
| L.E. Jones Company, LLC | 20 |
4 |
| ThyssenKrupp AG | 3456 |
4 |
| ThyssenKrupp Steel Europe AG | 977 |
4 |
| Heavy Metal, LLC | 6 |
4 |
| KHD Humboldt Wedag GmbH | 189 |
3 |
| Oerlikon Metco (US) Inc. | 216 |
3 |
| United States Steel Corporation | 171 |
3 |
| Resonac Corporation | 3159 |
3 |
| Uop LLC | 4296 |
2 |
| Rolls-Royce PLC | 3174 |
2 |
| ExxonMobil Chemical Patents Inc. | 3857 |
2 |
| Höganäs AB | 302 |
2 |
| The Japan Steel Works, Ltd. | 788 |
2 |
| L. E. Jones Company | 11 |
2 |
| Stoody Company | 13 |
2 |
| The Trustees of Princeton University | 1238 |
2 |
| Huawei Technologies Co., Ltd. | 119623 |
1 |
| Murata Manufacturing Co., Ltd. | 25455 |
1 |
| Other owners | 38 |