- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 33/187 - Preparation of finely divided silica neither in sol nor in gel formAfter-treatment thereof by acidic treatment of silicates
Patent holdings for IPC class C01B 33/187
Total number of patents in this class: 66
10-year publication summary
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2
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3
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2
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4
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3
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4
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1
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4
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6
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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
|
|---|---|---|
| Evonik Operations GmbH | 4105 |
9 |
| Rhodia Operations | 1586 |
8 |
| BASF SE | 20933 |
2 |
| Evonik Degussa GmbH | 1531 |
2 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10923 |
2 |
| Heraeus Quarzglas GmbH & Co. KG | 409 |
2 |
| Nanolith Sverige AB | 2 |
2 |
| TATA Chemicals Limited | 78 |
2 |
| Universite de Cergy Pontoise | 31 |
2 |
| Wacker Chemie AG | 2106 |
2 |
| Tianqi Lithium Kwinana Pty Ltd | 9 |
2 |
| AGC Si-Tech Co., Ltd. | 66 |
1 |
| Bluestar Silicones France. | 82 |
1 |
| Citibank, N.A., AS Administrative Agent | 270 |
1 |
| Clarkson University | 92 |
1 |
| Esseco S.r.l. | 31 |
1 |
| FUJIFILM Electronic Materials U.S.A., Inc. | 330 |
1 |
| Institutt for Energiteknikk | 72 |
1 |
| J.M. Huber Corporation | 123 |
1 |
| Nalco Company | 563 |
1 |
| Other owners | 22 |