- All sections
- C - Chemistry; metallurgy
- 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: 451
10-year publication summary
|
19
|
42
|
35
|
34
|
30
|
36
|
53
|
49
|
89
|
30
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Baoshan Iron & Steel Co., Ltd. | 832 |
58 |
| Nanjing Iron&Steel Co.,Ltd. | 135 |
24 |
| Jiangsu Shagang Group Co., Ltd. | 52 |
10 |
| Jiangyin Xingcheng Special Steel Works Co., Ltd. | 58 |
9 |
| Sumitomo Metal Mining Co., Ltd. | 1670 |
9 |
| Nippon Steel Corporation | 5649 |
8 |
| Institute of Research of Iron and Steel, Jiangsu Province/sha-steel, Co. Ltd | 32 |
8 |
| JFE Steel Corporation | 6067 |
7 |
| JFE Material Co., Ltd. | 16 |
6 |
| Northeastern University | 493 |
6 |
| Outokumpu Oyj | 250 |
5 |
| POSCO | 2222 |
5 |
| MM Metals USA, LLC | 10 |
5 |
| Elkem ASA | 205 |
4 |
| Magotteaux International S.A. | 119 |
4 |
| Mizushima Ferroalloy Co., Ltd. | 14 |
4 |
| POSCO Co., Ltd. | 1059 |
4 |
| Weir Minerals Australia, Ltd. | 309 |
4 |
| Wuhan Iron and Steel Company Limited | 23 |
4 |
| Qingdao Yunlu Advanced Materials Technology Co., Ltd. | 32 |
4 |
| Other owners | 263 |