- All sections
- C - Chemistrymetallurgy
- C25C - Processes for the electrolytic production, recovery or refining of metalsapparatus therefor
- C25C 3/20 - Automatic control or regulation of cells
Patent holdings for IPC class C25C 3/20
Total number of patents in this class: 120
10-year publication summary
|
12
|
8
|
6
|
5
|
7
|
4
|
11
|
3
|
5
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Rio Tinto ALCAN International Limited | 219 |
14 |
| Elysis Limited Partnership | 52 |
11 |
| Alcoa USA Corp. | 202 |
10 |
| China Aluminum International Engineering Corporation Limited | 79 |
9 |
| Dubai Aluminium PJSC | 68 |
6 |
| Alcoa Inc. | 254 |
5 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "obedinennaya Kompaniya RUSAL Inzhenerno-tekhnologicheskiy Tsentr" | 138 |
5 |
| Fives Ecl. | 24 |
4 |
| Newsouth Innovations Pty Limited | 622 |
4 |
| Norsk Hydro ASA | 247 |
4 |
| North China University of Technology | 28 |
3 |
| United Company RUSAL Engineering and Technology Centre LLC | 21 |
3 |
| University of Rochester | 1334 |
3 |
| Enpot Holdings Limited | 5 |
3 |
| Beijing SIO Technology Co., Ltd. | 3 |
3 |
| Zhengzhou Non-Ferrous Metals Research Institute Co.Ltd of Chalco | 80 |
2 |
| General Electric Company | 13910 |
1 |
| Toshiba Corporation | 12569 |
1 |
| Robert Bosch GmbH | 44176 |
1 |
| Aluminum Corporation of China Limited | 29 |
1 |
| Other owners | 27 |