- All sections
- C - Chemistrymetallurgy
- C01F - Compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare earth metals
- C01F 7/42 - Preparation of aluminium oxide or hydroxide from metallic aluminium, e.g. by oxidation
Patent holdings for IPC class C01F 7/42
Total number of patents in this class: 70
10-year publication summary
|
10
|
2
|
7
|
3
|
6
|
5
|
5
|
2
|
4
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Polar Sapphire Ltd. | 14 |
5 |
| B&B Gulf LLC | 7 |
5 |
| Aditya Birla Science and Technology Company Private Limited | 10 |
2 |
| Elkem AS | 57 |
2 |
| Nippon Light Metal Company, Ltd. | 680 |
2 |
| PhiChem America, Inc. | 4 |
2 |
| Shanghai Phichem Material Co. Ltd. | 6 |
2 |
| Solar Hydrogen Holdings, Inc. | 3 |
2 |
| Plassein Technologies Ltd, LLC | 23 |
2 |
| Kinaltek Pty. Ltd. | 7 |
2 |
| Elemental Recycling, Inc. | 9 |
2 |
| Nanomox Ltd | 10 |
2 |
| China Hydrogen Energy Science and Technology Development Co., Ltd. | 2 |
2 |
| GH Power Inc. | 4 |
2 |
| Hon Hai Precision Industry Co., Ltd. | 4016 |
1 |
| Hitachi, Ltd. | 15895 |
1 |
| Tsinghua University | 6110 |
1 |
| Korea Advanced Institute of Science and Technology | 4574 |
1 |
| Boe Technology Group Co., Ltd. | 42957 |
1 |
| Admatechs Company Limited | 89 |
1 |
| Other owners | 30 |