- All sections
- C - Chemistrymetallurgy
- C25C - Processes for the electrolytic production, recovery or refining of metalsapparatus therefor
- C25C 3/22 - Collecting emitted gases
Patent holdings for IPC class C25C 3/22
Total number of patents in this class: 125
10-year publication summary
|
10
|
4
|
1
|
4
|
8
|
2
|
6
|
1
|
6
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Norsk Hydro ASA | 261 |
13 |
| Alstom Technology Ltd | 1093 |
9 |
| Reel Alesa AG | 13 |
9 |
| Solios Environnement | 16 |
8 |
| Rio Tinto ALCAN International Limited | 215 |
7 |
| Reel Alesa AG | 17 |
7 |
| BASF SE | 21039 |
5 |
| ThyssenKrupp AG | 3315 |
5 |
| Alcoa Inc. | 282 |
4 |
| Alcoa USA Corp. | 199 |
4 |
| ThyssenKrupp Uhde GmbH | 338 |
4 |
| Reel Alesa | 4 |
4 |
| China Aluminum International Engineering Corporation Limited | 83 |
3 |
| Elysis Limited Partnership | 48 |
3 |
| Phoenix Tailings, Inc. | 32 |
3 |
| Alliance Magnesium | 17 |
2 |
| Aluminium PECHINEY | 8 |
2 |
| Danieli Corus BV | 26 |
2 |
| Fives Solios | 27 |
2 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "obedinennaya Kompaniya RUSAL Inzhenerno-tekhnologicheskiy Tsentr" | 133 |
2 |
| Other owners | 27 |