- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 13/06 - Making spongy iron or liquid steel, by direct processes in multi-storied furnaces
Patent holdings for IPC class C21B 13/06
Total number of patents in this class: 13
10-year publication summary
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1
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0
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0
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0
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0
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0
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0
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1
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0
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| POSCO | 2188 |
9 |
| Midrex Technologies, Inc. | 109 |
2 |
| Siemens VAI Metals Technologies GmbH | 222 |
1 |
| Nucor Corporation | 415 |
1 |
| Other owners | 0 |