- All sections
- C - Chemistrymetallurgy
- C21C - Processing of pig-iron, e.g. refining, manufacture of wrought-iron or steeltreatment 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: 15
10-year publication summary
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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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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Technological Resources Pty. Limited | 451 |
3 |
| Affival, Inc. | 3 |
2 |
| Tata Steel Limited | 175 |
2 |
| Tata Steel Limited | 17 |
2 |
| Molten Metal Equipment Innovations, Inc. | 9 |
1 |
| Molten Metal Equipment Innovations, LLC | 98 |
1 |
| SMS Group GmbH | 1117 |
1 |
| Specialty Minerals (Michigan) Inc. | 219 |
1 |
| ThyssenKrupp Steel Europe AG | 952 |
1 |
| Opta (USA) Inc. | 3 |
1 |
| Other owners | 0 |