- 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: 204
10-year publication summary
|
16
|
11
|
9
|
8
|
2
|
11
|
18
|
24
|
23
|
21
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Siemens VAI Metals Technologies GmbH | 233 |
29 |
| ArcelorMittal | 1887 |
19 |
| Primetals Technologies Austria GmbH | 479 |
16 |
| POSCO | 2222 |
15 |
| Technological Resources Pty. Limited | 444 |
11 |
| Midrex Technologies, Inc. | 103 |
10 |
| Hybrit Development AB | 38 |
7 |
| Paul Wurth S.A. | 392 |
5 |
| Shandong University | 886 |
5 |
| Tata Steel Ijmuiden B.V. | 283 |
5 |
| ThyssenKrupp Steel Europe AG | 924 |
5 |
| HYL Technologies, S.A. de C.V. | 41 |
4 |
| Tenova S.p.A. | 150 |
4 |
| Saudi Basic Industries Corporation | 625 |
3 |
| Beijing Zhongkaihongde Technology Co., Ltd. | 26 |
3 |
| Danieli & C. Officine Meccaniche S.p.A. | 680 |
3 |
| Institute of Process Engineering, Chinese Academy of Sciences | 250 |
3 |
| POSCO Co., Ltd. | 1059 |
3 |
| Tata Steel Limited | 184 |
3 |
| African Rainbow Minerals Limited | 10 |
3 |
| Other owners | 48 |