- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 9/12 - Hot-blast valves or slides for blast furnaces
Patent holdings for IPC class C21B 9/12
Total number of patents in this class: 11
10-year publication summary
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1
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Paul Wurth S.A. | 419 |
5 |
| Danieli Corus BV | 26 |
1 |
| Hyundai Steel Company | 427 |
1 |
| ThyssenKrupp AG | 3283 |
1 |
| ThyssenKrupp Steel Europe AG | 955 |
1 |
| z & J Technologies GmbH | 29 |
1 |
| Chungwon Metal Co., Ltd | 1 |
1 |
| Other owners | 0 |