- All sections
- C - Chemistry; metallurgy
- 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: 153
10-year publication summary
|
7
|
5
|
8
|
4
|
7
|
12
|
20
|
13
|
25
|
14
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
12 |
| GreenIron H2 AB | 26 |
12 |
| ArcelorMittal | 1887 |
8 |
| Technological Resources Pty. Limited | 444 |
8 |
| Tenova S.p.A. | 150 |
7 |
| Danieli & C. Officine Meccaniche S.p.A. | 680 |
5 |
| Paul Wurth S.A. | 392 |
5 |
| Midrex Technologies, Inc. | 103 |
4 |
| Newsouth Innovations Pty Limited | 567 |
4 |
| Taiyo Nippon Sanso Corporation | 356 |
4 |
| Hoei Shokai Co., Ltd. | 17 |
3 |
| Hyundai Steel Company | 310 |
3 |
| JFE Steel Corporation | 6067 |
3 |
| Primetals Technologies Austria GmbH | 479 |
3 |
| SMS Group GmbH | 1029 |
3 |
| Techint Compagnia Tecnica Internazionale S.p.A. | 22 |
3 |
| ThyssenKrupp Steel Europe AG | 924 |
3 |
| ChemTreat, Inc. | 198 |
2 |
| HYL Technologies, S.A. de C.V. | 41 |
2 |
| POSCO Co., Ltd. | 1059 |
2 |
| Other owners | 57 |