- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 32/33 - Preparation characterised by the starting materials from distillation residues of coal or petroleumPreparation characterised by the starting materials from petroleum acid sludge
Patent holdings for IPC class C01B 32/33
Total number of patents in this class: 53
10-year publication summary
|
1
|
1
|
4
|
7
|
5
|
4
|
3
|
6
|
7
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hanwha Solutions Corporation | 818 |
5 |
| China Petroleum & Chemical Corporation | 1899 |
2 |
| ENI S.p.A. | 1261 |
2 |
| Farad Power, Inc. | 12 |
2 |
| OCI Company Ltd. | 153 |
2 |
| POSCO Chemtech | 5 |
2 |
| Pukyong National University Industry-University Cooperation Foundation | 337 |
2 |
| SunCor Energy Inc. | 738 |
2 |
| Tokai Carbon Korea Co., Ltd. | 53 |
2 |
| Unitika Ltd. | 451 |
2 |
| Ad'all Co., Ltd. | 10 |
2 |
| Sinopec Dalian Research Institute of Petroleum and Petrochemicals Co., Ltd. | 94 |
2 |
| LG Chem, Ltd. | 17620 |
1 |
| Hyundai Motor Company | 21960 |
1 |
| Panasonic Intellectual Property Management Co., Ltd. | 31330 |
1 |
| Kia Motors Corporation | 7755 |
1 |
| Board of Trustees of Michigan State University | 1182 |
1 |
| Indian Oil Corporation Limited | 334 |
1 |
| Kuraray Co., Ltd. | 3503 |
1 |
| Kureha Corporation | 1027 |
1 |
| Other owners | 18 |