- All sections
- C - Chemistry; metallurgy
- C21B - Manufacture of iron or steel
- C21B 13/08 - Making spongy iron or liquid steel, by direct processes in rotary furnaces
Patent holdings for IPC class C21B 13/08
Total number of patents in this class: 48
10-year publication summary
1
|
0
|
6
|
0
|
4
|
2
|
1
|
4
|
8
|
3
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Sumitomo Metal Mining Co., Ltd. | 1670 |
4 |
Metso Minerals Oy | 152 |
3 |
Zhongye Changtian International Engineering Co., Ltd. | 73 |
3 |
Metso Outotec Finland Oy | 795 |
3 |
Eco'ring | 12 |
2 |
Hoei Shokai Co., Ltd. | 17 |
2 |
Kobe Steel, Ltd. | 912 |
2 |
Nippon Steel & Sumitomo Metal Corporation | 1990 |
2 |
Tetsugen Corporation | 4 |
2 |
Tohoku University | 2526 |
2 |
Coolbrook Oy | 50 |
1 |
Danieli & C. Officine Meccaniche S.p.A. | 680 |
1 |
HYL Technologies, S.A. de C.V. | 41 |
1 |
Iron Mineral Beneficiation Services (Proprietary) Limited | 2 |
1 |
JFE Steel Corporation | 6067 |
1 |
Nippon Steel Corporation | 5649 |
1 |
Nu-Iron Technology, LLC | 44 |
1 |
Outotec (Finland) Oy | 491 |
1 |
POSCO | 2222 |
1 |
Primetals Technologies Austria GmbH | 479 |
1 |
Other owners | 13 |