- All sections
- C - Chemistry; metallurgy
- C21B - Manufacture of iron or steel
- C21B 13/14 - Multi-stage processes
Patent holdings for IPC class C21B 13/14
Total number of patents in this class: 218
10-year publication summary
|
11
|
9
|
8
|
2
|
11
|
18
|
24
|
23
|
39
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens VAI Metals Technologies GmbH | 226 |
28 |
| ArcelorMittal | 2052 |
19 |
| Primetals Technologies Austria GmbH | 509 |
17 |
| POSCO | 2204 |
14 |
| Midrex Technologies, Inc. | 103 |
10 |
| Technological Resources Pty. Limited | 443 |
10 |
| ThyssenKrupp Steel Europe AG | 956 |
8 |
| Hybrit Development AB | 48 |
8 |
| Tata Steel Ijmuiden B.V. | 300 |
6 |
| Paul Wurth S.A. | 408 |
5 |
| Shandong University | 966 |
5 |
| Danieli & C. Officine Meccaniche S.p.A. | 705 |
4 |
| HYL Technologies, S.A. de C.V. | 42 |
4 |
| POSCO Co., Ltd. | 1293 |
4 |
| Tenova S.p.A. | 154 |
4 |
| Beijing Zhongkaihongde Technology Co., Ltd. | 23 |
3 |
| Institute of Process Engineering, Chinese Academy of Sciences | 280 |
3 |
| Tata Steel Limited | 190 |
3 |
| African Rainbow Minerals Limited | 13 |
3 |
| Saudi Basic Industries Corporation | 591 |
2 |
| Other owners | 58 |