- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 32/28 - After-treatment, e.g. purification, irradiation, separation or recovery
Patent holdings for IPC class C01B 32/28
Total number of patents in this class: 279
10-year publication summary
|
12
|
21
|
17
|
31
|
28
|
38
|
34
|
22
|
18
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Daicel Corporation | 2432 |
63 |
| Schlumberger Technology Corporation | 11274 |
13 |
| Kyoto University | 2877 |
8 |
| Schlumberger Canada Limited | 7487 |
6 |
| Diamond Innovations, Inc. | 236 |
6 |
| Element Six Technologies Limited | 203 |
6 |
| S.W. Chemicals Co. Ltd. | 7 |
6 |
| Sumitomo Electric Industries, Ltd. | 15967 |
5 |
| National Institute of Advanced Industrial Science and Technology | 3795 |
5 |
| US Synthetic Corporation | 614 |
5 |
| Element Six (UK) Limited | 224 |
5 |
| Schlumberger Technology B.v. | 5245 |
4 |
| Carbodeon Ltd Oy | 27 |
4 |
| Services Petroliers Schlumberger | 5923 |
4 |
| The University of Warwick | 253 |
4 |
| Halliburton Energy Services, Inc. | 21098 |
3 |
| The Regents of the University of California | 20378 |
3 |
| Applied Materials, Inc. | 19683 |
3 |
| Kyushu Institute of Technology | 290 |
3 |
| IIA Technologies Pte. Ltd. | 13 |
3 |
| Other owners | 120 |