- 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: 519
10-year publication summary
|
42
|
35
|
34
|
30
|
36
|
53
|
49
|
91
|
78
|
7
|
| 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. | 897 |
62 |
| Nanjing Iron&Steel Co.,Ltd. | 153 |
34 |
| Jiangsu Shagang Group Co., Ltd. | 67 |
13 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 62 |
12 |
| Sumitomo Metal Mining Co., Ltd. | 1730 |
9 |
| Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd | 43 |
9 |
| Nippon Steel Corporation | 6012 |
8 |
| JFE Steel Corporation | 6557 |
7 |
| Northeastern University | 522 |
7 |
| MM Metals USA, LLC | 12 |
7 |
| JFE Material Co., Ltd. | 15 |
6 |
| Shandong Iron and Steel Company Ltd | 24 |
6 |
| Outokumpu Oyj | 251 |
5 |
| POSCO | 2204 |
5 |
| Qingdao Yunlu Advanced Materials Technology Co., Ltd. | 40 |
5 |
| Institute of Research of Iron & Steel, Jiangsu Province/sha-steel, Co., Ltd. | 27 |
5 |
| Zhangjiagang Yangtze River Cold Rolled Plate Co. Ltd | 12 |
5 |
| Elkem ASA | 206 |
4 |
| Magotteaux International S.A. | 120 |
4 |
| Mizushima Ferroalloy Co., Ltd. | 14 |
4 |
| Other owners | 302 |