- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 13/12 - Making spongy iron or liquid steel, by direct processes in electric furnaces
Patent holdings for IPC class C21B 13/12
Total number of patents in this class: 193
10-year publication summary
|
5
|
5
|
3
|
6
|
8
|
13
|
13
|
21
|
36
|
20
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ArcelorMittal | 2293 |
18 |
| GreenIron H2 AB | 32 |
14 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2869 |
12 |
| Technological Resources Pty. Limited | 455 |
11 |
| Tenova S.p.A. | 156 |
7 |
| ThyssenKrupp Steel Europe AG | 956 |
7 |
| Danieli & C. Officine Meccaniche S.p.A. | 717 |
5 |
| JFE Steel Corporation | 6849 |
5 |
| POSCO Co., Ltd. | 1568 |
5 |
| Hyundai Steel Company | 430 |
4 |
| Midrex Technologies, Inc. | 111 |
4 |
| Paul Wurth S.A. | 418 |
4 |
| Primetals Technologies Austria GmbH | 536 |
4 |
| Taiyo Nippon Sanso Corporation | 365 |
4 |
| Newsouth Innovations Pty Limited | 593 |
3 |
| SMS Group GmbH | 1127 |
3 |
| Hybrit Development AB | 61 |
3 |
| ChemTreat, Inc. | 230 |
2 |
| Hatch Ltd. | 214 |
2 |
| Hoei Shokai Co., Ltd. | 13 |
2 |
| Other owners | 74 |