- All sections
- C - Chemistrymetallurgy
- C21B - Manufacture of iron or steel
- C21B 9/04 - Brick hot-blast stoves with combustion shaft
Patent holdings for IPC class C21B 9/04
Total number of patents in this class: 6
10-year publication summary
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0
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2
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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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0
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Linde Aktiengesellschaft | 1433 |
2 |
| Nippon Steel & Sumikin Engineering Co., Ltd. | 169 |
1 |
| NS Plant designing Corporation | 19 |
1 |
| Paul Wurth S.A. | 430 |
1 |
| Paul Wurth Deutschland GmbH | 26 |
1 |
| Other owners | 0 |