- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds thereof
- C01B 21/44 - Concentration
Patent holdings for IPC class C01B 21/44
Total number of patents in this class: 5
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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0
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3
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0
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1
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0
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| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Covestro Intellectual Property GmbH & Co. KG | 501 |
2 |
| ThyssenKrupp AG | 3086 |
1 |
| ThyssenKrupp Industrial Solutions AG | 729 |
1 |
| Suzhou Jingzhou Equipment Technology Co., Ltd. | 10 |
1 |
| Other owners | 0 |