- 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: 462
10-year publication summary
|
31
|
28
|
27
|
8
|
24
|
19
|
31
|
35
|
21
|
14
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Alcoa USA Corp. | 202 |
42 |
| Rio Tinto ALCAN International Limited | 218 |
35 |
| SGL Carbon SE | 405 |
29 |
| Tokai Cobex GmbH | 46 |
26 |
| Norsk Hydro ASA | 246 |
24 |
| China Aluminum International Engineering Corporation Limited | 79 |
23 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "obedinennaya Kompaniya RUSAL Inzhenerno-tekhnologicheskiy Tsentr" | 138 |
21 |
| Elysis Limited Partnership | 54 |
20 |
| Dubai Aluminium PJSC | 68 |
15 |
| Novalum SA | 14 |
12 |
| Aluminum Corporation of China Limited | 29 |
8 |
| United Company RUSAL Engineering and Technology Centre LLC | 21 |
7 |
| Fives Ecl. | 25 |
6 |
| Mid-Mountain Materials, Inc. | 22 |
6 |
| Saint-Gobain Centre de Recherches et d'Etudes Europeen | 497 |
6 |
| Zhengzhou Non-Ferrous Metals Research Institute Co.Ltd of Chalco | 80 |
6 |
| Goodtech Recovery Technology AS | 8 |
5 |
| Hatch Ltd. | 221 |
5 |
| SEC Carbon, Limited | 31 |
5 |
| BHP Billiton Aluminium Technologies Limited | 5 |
4 |
| Other owners | 157 |