- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 33/037 - Purification
Patent holdings for IPC class C01B 33/037
Total number of patents in this class: 338
10-year publication summary
|
16
|
16
|
15
|
12
|
16
|
12
|
11
|
14
|
8
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Wacker Chemie AG | 2108 |
25 |
| Sharp Kabushiki Kaisha | 18520 |
15 |
| Silicor Materials Inc. | 21 |
11 |
| Commissariat à l'énergie atomique et aux energies alternatives | 11130 |
10 |
| Shin-Etsu Chemical Co., Ltd. | 6117 |
8 |
| ULVAC, Inc. | 1344 |
8 |
| Tokuyama Corporation | 1482 |
7 |
| Evonik Degussa GmbH | 1357 |
5 |
| REC Silicon Inc | 76 |
5 |
| Silicio Ferrosolar S.L. | 5 |
5 |
| Milwaukee Silicon, LLC | 5 |
5 |
| Sumitomo Chemical Company, Limited | 8963 |
4 |
| EFD Induction SA | 7 |
4 |
| Institut Polytechnique de Grenoble | 427 |
4 |
| Korea Institute of Energy Research | 901 |
4 |
| Umicore | 776 |
4 |
| REC Solar Norway AS | 10 |
4 |
| Ferroglobe Innovation, S.L. | 6 |
4 |
| High-purity Silicon Corporation | 73 |
4 |
| Toyota Motor Corporation | 35906 |
3 |
| Other owners | 199 |