- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds 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: 247
10-year publication summary
|
6
|
12
|
21
|
17
|
33
|
27
|
39
|
35
|
22
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Daicel Corporation | 2237 |
60 |
| Schlumberger Technology Corporation | 10217 |
7 |
| Kyoto University | 2778 |
7 |
| National Institute of Advanced Industrial Science and Technology | 3727 |
6 |
| Sumitomo Electric Industries, Ltd. | 14914 |
5 |
| Element Six Technologies Limited | 187 |
5 |
| US Synthetic Corporation | 607 |
5 |
| Element Six (UK) Limited | 203 |
5 |
| Schlumberger Canada Limited | 7137 |
4 |
| Schlumberger Technology B.v. | 5058 |
4 |
| Carbodeon Ltd Oy | 28 |
4 |
| Diamond Innovations, Inc. | 236 |
4 |
| Services Petroliers Schlumberger | 5616 |
4 |
| The University of Warwick | 244 |
4 |
| Halliburton Energy Services, Inc. | 20403 |
3 |
| The Regents of the University of California | 19479 |
3 |
| Applied Materials, Inc. | 17676 |
3 |
| Kyushu Institute of Technology | 302 |
3 |
| IIA Technologies Pte. Ltd. | 15 |
3 |
| S.W. Chemicals Co. Ltd. | 4 |
3 |
| Other owners | 105 |