- 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: 300
10-year publication summary
|
19
|
7
|
18
|
24
|
12
|
13
|
16
|
13
|
23
|
16
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Molten Metal Equipment Innovations, LLC | 100 |
28 |
| Pyrotek, Inc. | 207 |
22 |
| Mitsui Mining & Smelting Co., Ltd. | 1069 |
15 |
| Kabushiki Kaisha Toyota Chuo Kenkyusho | 690 |
12 |
| Norsk Hydro ASA | 246 |
11 |
| Toyota Tsusho Corporation | 192 |
11 |
| Constellium Issoire | 228 |
10 |
| Southwire Company, LLC | 810 |
9 |
| The Boeing Company | 20196 |
7 |
| Nippon Light Metal Company, Ltd. | 685 |
6 |
| Alcoa USA Corp. | 202 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2841 |
5 |
| Novelis Inc. | 784 |
5 |
| Foseco International Limited | 216 |
4 |
| Alcoa Canada Co | 6 |
4 |
| Exentis Knowledge GmbH | 71 |
4 |
| Toyota Motor Corporation | 35992 |
3 |
| Showa Denko K.K. | 2061 |
3 |
| Alcoa Inc. | 251 |
3 |
| Altek, L.L.C. | 15 |
3 |
| Other owners | 130 |