- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 13/04 - Making spongy iron or liquid steel, by direct processes in retorts
Patent holdings for IPC class C21B 13/04
Total number of patents in this class: 5
10-year publication summary
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0
|
0
|
2
|
1
|
1
|
0
|
1
|
2
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Environmental Clean Technologies Limited | 3 |
3 |
| Fluor Technologies Corporation | 383 |
1 |
| Shandong University | 979 |
1 |
| Other owners | 0 |