- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 21/06 - Refining
Patent holdings for IPC class C22B 21/06
Total number of patents in this class: 284
10-year publication summary
|
24
|
19
|
7
|
18
|
24
|
12
|
13
|
15
|
12
|
12
|
| 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 | 98 |
28 |
| Pyrotek, Inc. | 201 |
21 |
| Mitsui Mining & Smelting Co., Ltd. | 1472 |
17 |
| Constellium Issoire | 219 |
10 |
| Kabushiki Kaisha Toyota Chuo Kenkyusho | 619 |
10 |
| Norsk Hydro ASA | 262 |
10 |
| Southwire Company, LLC | 782 |
9 |
| Toyota Tsusho Corporation | 184 |
9 |
| The Boeing Company | 20031 |
7 |
| Nippon Light Metal Company, Ltd. | 661 |
6 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2876 |
5 |
| Alcoa USA Corp. | 198 |
4 |
| Foseco International Limited | 212 |
4 |
| Alcoa Canada Co | 6 |
4 |
| Exentis Knowledge GmbH | 51 |
4 |
| Toyota Motor Corporation | 31693 |
3 |
| Showa Denko K.K. | 2266 |
3 |
| Alcoa Inc. | 295 |
3 |
| Aleris Switzerland GmbH | 4 |
3 |
| Altek, L.L.C. | 15 |
3 |
| Other owners | 121 |