- All sections
- C - Chemistry; metallurgy
- C01B - Non-metallic elements; compounds thereof
- C01B 15/023 - Preparation from organic compounds by the alkyl-anthraquinone process
Patent holdings for IPC class C01B 15/023
Total number of patents in this class: 101
10-year publication summary
|
5
|
5
|
4
|
2
|
4
|
5
|
10
|
13
|
15
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Solvay SA | 1181 |
34 |
| Evonik Operations GmbH | 3879 |
12 |
| Mitsubishi Gas Chemical Company, Inc. | 3188 |
6 |
| Heesung Catalysts Corporation | 110 |
5 |
| BASF SE | 19740 |
4 |
| China Petroleum & Chemical Corporation | 1623 |
4 |
| Arkema France | 3790 |
3 |
| Research Institute of Petroleum Processing, Sinopec | 387 |
3 |
| Nanjing Institute of Microinterface Technology Co., Ltd | 32 |
3 |
| Evonik Corporation | 100 |
2 |
| FUJIFILM Corporation | 27102 |
2 |
| OCI Company Ltd. | 131 |
2 |
| Solvay (China) Co., Ltd. | 30 |
2 |
| The University of British Columbia | 1432 |
2 |
| Yangzhou Huitong Chemical Engineering Technique Co., Ltd | 3 |
2 |
| The Regents of the University of California | 18943 |
1 |
| Akzo Nobel N.V. | 240 |
1 |
| Beijing University of Chemical Technology | 287 |
1 |
| Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 614 |
1 |
| Ecolab USA Inc. | 5190 |
1 |
| Other owners | 10 |