- All sections
- C - Chemistrymetallurgy
- C25C - Processes for the electrolytic production, recovery or refining of metalsapparatus therefor
- C25C 3/08 - Cell construction, e.g. bottoms, walls, cathodes
Patent holdings for IPC class C25C 3/08
Total number of patents in this class: 444
10-year publication summary
|
29
|
31
|
28
|
27
|
8
|
23
|
19
|
30
|
31
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alcoa USA Corp. | 198 |
36 |
| Rio Tinto ALCAN International Limited | 216 |
35 |
| SGL Carbon SE | 388 |
29 |
| Tokai Cobex GmbH | 47 |
26 |
| Norsk Hydro ASA | 262 |
23 |
| China Aluminum International Engineering Corporation Limited | 89 |
22 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "obedinennaya Kompaniya RUSAL Inzhenerno-tekhnologicheskiy Tsentr" | 131 |
22 |
| Elysis Limited Partnership | 47 |
15 |
| Dubai Aluminium PJSC | 62 |
14 |
| Aluminum Corporation of China Limited | 35 |
11 |
| Novalum SA | 11 |
9 |
| United Company RUSAL Engineering and Technology Centre LLC | 21 |
7 |
| Fives Ecl. | 23 |
6 |
| Mid-Mountain Materials, Inc. | 21 |
6 |
| Goodtech Recovery Technology AS | 8 |
5 |
| Hatch Ltd. | 213 |
5 |
| Saint-Gobain Centre de Recherches et d'Etudes Europeen | 491 |
5 |
| SEC Carbon, Limited | 29 |
5 |
| BHP Billiton Aluminium Technologies Limited | 5 |
4 |
| Moltech Invent S.A. | 4 |
4 |
| Other owners | 155 |