- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 19/30 - Obtaining zinc or zinc oxide from metallic residues or scraps
Patent holdings for IPC class C22B 19/30
Total number of patents in this class: 137
10-year publication summary
|
8
|
10
|
3
|
17
|
9
|
9
|
7
|
13
|
14
|
11
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Northeastern University | 538 |
8 |
| Beijing University of Technology | 492 |
5 |
| JFE Steel Corporation | 6827 |
4 |
| DRT Deutsche Rohstofftechnik GmbH | 3 |
3 |
| Glencore Technology Pty Ltd | 51 |
3 |
| Kinotech Solar Energy Corporation | 13 |
3 |
| Nippon Mining & Metals Co., Ltd. | 115 |
3 |
| Tohoku University | 2776 |
3 |
| China ENFI Engineering Corp. | 102 |
3 |
| Montanuniversität Leoben | 54 |
3 |
| Reazn Belgium | 3 |
3 |
| Ecotec Gestione Impianti S.r.l. | 11 |
2 |
| Guizhou University | 42 |
2 |
| Hoei Shokai Co., Ltd. | 13 |
2 |
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2873 |
2 |
| Korea Zinc Co., Ltd. | 89 |
2 |
| Minex Technologies Limited | 2 |
2 |
| Pyrogenesis Canada, Inc. | 67 |
2 |
| Teknologian Tutkimuskeskus VTT Oy | 530 |
2 |
| ThyssenKrupp Steel Europe AG | 954 |
2 |
| Other owners | 78 |