- 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: 440
10-year publication summary
|
22
|
21
|
19
|
21
|
7
|
16
|
14
|
19
|
26
|
6
|
| 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 | 214 |
33 |
| SGL Carbon SE | 390 |
29 |
| Tokai Cobex GmbH | 45 |
25 |
| Norsk Hydro ASA | 260 |
24 |
| China Aluminum International Engineering Corporation Limited | 83 |
22 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "obedinennaya Kompaniya RUSAL Inzhenerno-tekhnologicheskiy Tsentr" | 133 |
22 |
| Elysis Limited Partnership | 48 |
16 |
| Dubai Aluminium PJSC | 62 |
14 |
| Aluminum Corporation of China Limited | 35 |
11 |
| Novalum SA | 10 |
8 |
| United Company RUSAL Engineering and Technology Centre LLC | 21 |
7 |
| Fives Ecl. | 24 |
6 |
| Mid-Mountain Materials, Inc. | 21 |
6 |
| Goodtech Recovery Technology AS | 8 |
5 |
| Hatch Ltd. | 214 |
5 |
| Saint-Gobain Centre de Recherches et d'Etudes Europeen | 493 |
5 |
| SEC Carbon, Limited | 30 |
5 |
| BHP Billiton Aluminium Technologies Limited | 5 |
4 |
| Moltech Invent S.A. | 4 |
4 |
| Other owners | 153 |