- 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: 292
10-year publication summary
|
12
|
21
|
17
|
34
|
28
|
39
|
37
|
24
|
18
|
14
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Daicel Corporation | 2575 |
65 |
| Schlumberger Technology Corporation | 11961 |
15 |
| Kyoto University | 2941 |
9 |
| Schlumberger Canada Limited | 7616 |
7 |
| Diamond Innovations, Inc. | 235 |
6 |
| Element Six Technologies Limited | 207 |
6 |
| S.W. Chemicals Co. Ltd. | 7 |
6 |
| Schlumberger Technology B.v. | 5289 |
5 |
| Sumitomo Electric Industries, Ltd. | 16404 |
5 |
| National Institute of Advanced Industrial Science and Technology | 3793 |
5 |
| Services Petroliers Schlumberger | 6024 |
5 |
| US Synthetic Corporation | 616 |
5 |
| Element Six (UK) Limited | 238 |
5 |
| Applied Materials, Inc. | 20601 |
4 |
| Carbodeon Ltd Oy | 26 |
4 |
| The University of Warwick | 257 |
4 |
| Halliburton Energy Services, Inc. | 21299 |
3 |
| The Regents of the University of California | 20924 |
3 |
| Kyushu Institute of Technology | 287 |
3 |
| IIA Technologies Pte. Ltd. | 13 |
3 |
| Other owners | 124 |