- All sections
- C - Chemistry; metallurgy
- C22B - Production or refining of metals; pretreatment of raw materials
- C22B 9/02 - Refining by liquating, filtering, centrifuging, distilling or supersonic wave action
Patent holdings for IPC class C22B 9/02
Total number of patents in this class: 264
10-year publication summary
|
18
|
20
|
20
|
19
|
23
|
17
|
14
|
18
|
25
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Pyrotek, Inc. | 193 |
12 |
| Mitsui Mining & Smelting Co., Ltd. | 1373 |
10 |
| Southwire Company, LLC | 711 |
10 |
| JX Nippon Mining & Metals Corporation | 1576 |
8 |
| Constellium Issoire | 208 |
6 |
| Norsk Hydro ASA | 288 |
6 |
| Metallo Belgium | 53 |
6 |
| Kunming University of Science and Technology | 117 |
5 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
4 |
| Nant Holdings IP, LLC | 659 |
4 |
| Exentis Knowledge GmbH | 46 |
4 |
| Hitachi, Ltd. | 16452 |
3 |
| Showa Denko K.K. | 2539 |
3 |
| Aleris Switzerland GmbH | 4 |
3 |
| Eth Zurich | 1193 |
3 |
| Korea Zinc Co., Ltd. | 41 |
3 |
| Porvair plc | 24 |
3 |
| Rolls-Royce Corporation | 1686 |
3 |
| Coogee Titanium Pty Ltd | 12 |
3 |
| Alcoa Canada Co | 5 |
3 |
| Other owners | 162 |