- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 11/08 - Making pig-iron other than in blast furnaces in hearth-type furnaces
Patent holdings for IPC class C21B 11/08
Total number of patents in this class: 43
10-year publication summary
|
3
|
3
|
2
|
1
|
0
|
3
|
0
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2875 |
17 |
| Nu-Iron Technology, LLC | 33 |
7 |
| Tata Steel Limited | 175 |
5 |
| Kobe Steel, Ltd. | 872 |
2 |
| Tata Steel Ijmuiden B.V. | 308 |
2 |
| Tata Steel Nederland Technology BV | 151 |
2 |
| Technological Resources Pty. Limited | 452 |
2 |
| Tata Steel Limited | 17 |
2 |
| Beijing Zhongkaihongde Technology Co., Ltd. | 23 |
1 |
| Hatch Ltd. | 214 |
1 |
| Institute of Process Engineering, Chinese Academy of Sciences | 293 |
1 |
| Primetals Technologies Japan, Ltd. | 162 |
1 |
| Other owners | 0 |