- 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: 65
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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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
|
|---|---|---|
| Evonik Operations GmbH | 4027 |
9 |
| Rhodia Operations | 1589 |
7 |
| BASF SE | 20421 |
2 |
| Evonik Degussa GmbH | 1555 |
2 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10693 |
2 |
| Heraeus Quarzglas GmbH & Co. KG | 408 |
2 |
| Nanolith Sverige AB | 2 |
2 |
| TATA Chemicals Limited | 77 |
2 |
| Universite de Cergy Pontoise | 31 |
2 |
| Wacker Chemie AG | 2107 |
2 |
| Tianqi Lithium Kwinana Pty Ltd | 9 |
2 |
| AGC Si-Tech Co., Ltd. | 62 |
1 |
| Bluestar Silicones France. | 91 |
1 |
| Citibank, N.A., AS Administrative Agent | 276 |
1 |
| Clarkson University | 92 |
1 |
| Esseco S.r.l. | 32 |
1 |
| FUJIFILM Electronic Materials U.S.A., Inc. | 298 |
1 |
| Institutt for Energiteknikk | 77 |
1 |
| J.M. Huber Corporation | 135 |
1 |
| Nalco Company | 594 |
1 |
| Other owners | 22 |