- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 9/187 - Apparatus therefor, e.g. furnaces
Patent holdings for IPC class C22B 9/187
Total number of patents in this class: 7
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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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
|
|---|---|---|
| Hitachi Metals, Ltd. | 1985 |
1 |
| Dowa ECO-SYSTEM Co., Ltd. | 55 |
1 |
| Mitsubishi Materials Corporation | 2439 |
1 |
| Nippon Steel Corporation | 6207 |
1 |
| Soochow University | 1735 |
1 |
| Sumitomo Metal Industries, Ltd. | 383 |
1 |
| Longnan Longyi Heavy Rare-earth Technology Co., Ltd. | 8 |
1 |
| Other owners | 0 |