- All sections
- C - Chemistry; metallurgy
- C22B - Production or refining of metals; pretreatment of raw materials
- C22B 21/00 - Obtaining aluminium
Patent holdings for IPC class C22B 21/00
Total number of patents in this class: 688
10-year publication summary
|
41
|
30
|
40
|
29
|
45
|
33
|
43
|
70
|
94
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Molten Metal Equipment Innovations, LLC | 97 |
31 |
| Guangdong Brunp Recycling Technology Co., Ltd | 971 |
28 |
| Hunan Brunp Recycling Technology Co., Ltd. | 928 |
28 |
| Novelis Inc. | 704 |
25 |
| Pyrotek, Inc. | 195 |
18 |
| Altek Europe Limited | 37 |
16 |
| Hunan Brunp EV Recycling Co., Ltd. | 362 |
13 |
| Constellium Neuf-brisach | 131 |
12 |
| Constellium Issoire | 214 |
11 |
| House of Metals Company Limited | 33 |
10 |
| Norsk Hydro ASA | 275 |
10 |
| Constellium Muscle Shoals LLC | 27 |
10 |
| AEM Canada Group Inc. | 13 |
10 |
| AEM Technologies Inc. | 34 |
9 |
| The Boeing Company | 19901 |
8 |
| Altek, L.L.C. | 16 |
8 |
| Sumitomo Metal Mining Co., Ltd. | 1726 |
8 |
| Li-Cycle Corp. | 40 |
8 |
| Obshchestvo S Ogranichennoy Otvetstvennost'yu "obedinennaya Kompaniya RUSAL Inzhenerno-tekhnologicheskiy Tsentr" | 148 |
7 |
| Orbite Aluminae Inc. | 14 |
7 |
| Other owners | 411 |