- All sections
- C - Chemistrymetallurgy
- C22C - Alloys
- C22C 33/04 - Making ferrous alloys by melting
Patent holdings for IPC class C22C 33/04
Total number of patents in this class: 581
10-year publication summary
|
37
|
34
|
32
|
29
|
33
|
48
|
47
|
92
|
79
|
40
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baoshan Iron & Steel Co., Ltd. | 965 |
70 |
| Nanjing Iron&Steel Co.,Ltd. | 165 |
36 |
| Jiangsu Shagang Group Co., Ltd. | 92 |
17 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 61 |
12 |
| Sumitomo Metal Mining Co., Ltd. | 1782 |
10 |
| Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd | 66 |
10 |
| JFE Steel Corporation | 6874 |
8 |
| Nippon Steel Corporation | 6296 |
8 |
| MM Metals USA, LLC | 13 |
8 |
| Institute of Research of Iron & Steel, Jiangsu Province/sha-steel, Co., Ltd. | 31 |
8 |
| Northeastern University | 541 |
7 |
| JFE Material Co., Ltd. | 15 |
6 |
| Shandong Iron and Steel Company Ltd | 34 |
6 |
| Qingdao Yunlu Advanced Materials Technology Co., Ltd. | 41 |
6 |
| Outokumpu Oyj | 260 |
5 |
| POSCO | 2184 |
5 |
| Zhangjiagang Yangtze River Cold Rolled Plate Co. Ltd | 18 |
5 |
| Fujian Golden Dragon Rare-earth Co., Ltd. | 64 |
5 |
| Angang Steel Company Limited | 26 |
4 |
| ArcelorMittal | 2315 |
4 |
| Other owners | 341 |