- All sections
- C - Chemistry; metallurgy
- 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: 99
10-year publication summary
|
13
|
20
|
8
|
10
|
12
|
11
|
3
|
4
|
5
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 2175 |
5 |
| ArcelorMittal | 1887 |
4 |
| L.E. Jones Company, LLC | 16 |
4 |
| ThyssenKrupp AG | 3086 |
4 |
| ThyssenKrupp Steel Europe AG | 924 |
4 |
| United States Steel Corporation | 168 |
4 |
| Heavy Metal, LLC | 6 |
4 |
| KHD Humboldt Wedag GmbH | 192 |
3 |
| Oerlikon Metco (US) Inc. | 202 |
3 |
| Resonac Corporation | 2233 |
3 |
| Uop LLC | 4083 |
2 |
| Rolls-Royce PLC | 2944 |
2 |
| ExxonMobil Chemical Patents Inc. | 4286 |
2 |
| Höganäs AB | 337 |
2 |
| The Japan Steel Works, Ltd. | 597 |
2 |
| L. E. Jones Company | 11 |
2 |
| Stoody Company | 27 |
2 |
| The Trustees of Princeton University | 1129 |
2 |
| Uddeholms Aktiebolag | 197 |
2 |
| Huawei Technologies Co., Ltd. | 100781 |
1 |
| Other owners | 42 |