- All sections
- C - Chemistry; metallurgy
- C21C - Processing of pig-iron, e.g. refining, manufacture of wrought-iron or steel; treatment in molten state of ferrous alloys
- C21C 5/04 - Manufacture of hearth-furnace steel, e.g. Siemens-Martin steel
Patent holdings for IPC class C21C 5/04
Total number of patents in this class: 16
10-year publication summary
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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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1
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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
|
|---|---|---|
| Tata Steel Limited | 190 |
4 |
| Technological Resources Pty. Limited | 443 |
4 |
| Affival, Inc. | 4 |
2 |
| Molten Metal Equipment Innovations, Inc. | 9 |
1 |
| Molten Metal Equipment Innovations, LLC | 97 |
1 |
| SMS Group GmbH | 1079 |
1 |
| Specialty Minerals (Michigan) Inc. | 217 |
1 |
| ThyssenKrupp Steel Europe AG | 956 |
1 |
| Opta (USA) Inc. | 2 |
1 |
| Other owners | 0 |