- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds 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: 121
10-year publication summary
|
4
|
2
|
4
|
5
|
10
|
14
|
17
|
12
|
5
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Solvay SA | 946 |
38 |
| Evonik Operations GmbH | 4374 |
12 |
| Arkema France | 4246 |
8 |
| China Petroleum & Chemical Corporation | 2158 |
6 |
| Mitsubishi Gas Chemical Company, Inc. | 3631 |
6 |
| Heesung Catalysts Corporation | 121 |
5 |
| BASF SE | 21318 |
4 |
| Research Institute of Petroleum Processing, Sinopec | 362 |
4 |
| Nanjing Institute of Microinterface Technology Co., Ltd | 50 |
4 |
| Solvay (China) Co., Ltd. | 31 |
3 |
| Evonik Corporation | 78 |
2 |
| FUJIFILM Corporation | 30543 |
2 |
| OCI Company Ltd. | 166 |
2 |
| The University of British Columbia | 1546 |
2 |
| Yangzhou Huitong Chemical Engineering Technique Co., Ltd | 3 |
2 |
| Sinopec Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd. | 139 |
2 |
| The Regents of the University of California | 20790 |
1 |
| Beijing University of Chemical Technology | 334 |
1 |
| China University of Petroleum (East China) | 420 |
1 |
| Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 692 |
1 |
| Other owners | 15 |