- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 38/22 - Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
Patent holdings for IPC class C22C 38/22
Total number of patents in this class: 2286
10-year publication summary
|
183
|
200
|
188
|
208
|
176
|
161
|
179
|
225
|
183
|
148
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nippon Steel Corporation | 6540 |
261 |
| JFE Steel Corporation | 7097 |
222 |
| POSCO Co., Ltd. | 1604 |
183 |
| ArcelorMittal | 2414 |
175 |
| POSCO | 2167 |
100 |
| Baoshan Iron & Steel Co., Ltd. | 1004 |
86 |
| ThyssenKrupp Steel Europe AG | 963 |
40 |
| Hyundai Steel Company | 453 |
39 |
| Hitachi Metals, Ltd. | 1955 |
31 |
| Salzgitter Flachstahl GmbH | 160 |
28 |
| NTN Corporation | 4956 |
25 |
| NIPPON STEEL Stainless Steel Corporation | 276 |
23 |
| Aktiebolaget SKF | 3023 |
21 |
| Tata Steel Ijmuiden B.V. | 311 |
21 |
| ThyssenKrupp AG | 3361 |
18 |
| Kobe Steel, Ltd. | 886 |
14 |
| Daido Steel Co., Ltd. | 275 |
12 |
| Höganäs AB | 311 |
12 |
| Oerlikon Metco (US) Inc. | 211 |
12 |
| Nanjing Iron&Steel Co.,Ltd. | 174 |
12 |
| Other owners | 951 |