- All sections
- C - Chemistrymetallurgy
- C22B - Production or refining of metalspretreatment of raw materials
- C22B 4/04 - Heavy metals
Patent holdings for IPC class C22B 4/04
Total number of patents in this class: 32
10-year publication summary
|
1
|
1
|
2
|
1
|
1
|
2
|
1
|
7
|
5
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ATI Properties LLC | 204 |
2 |
| Technological Resources Pty. Limited | 451 |
2 |
| William Marsh Rice University | 1002 |
2 |
| China ENFI Engineering Corp. | 100 |
2 |
| Phoenix Tailings, Inc. | 29 |
2 |
| The Trustees of Columbia University in the City of New York | 3561 |
1 |
| Battelle Memorial Institute | 2475 |
1 |
| Gem Co., Ltd. | 213 |
1 |
| Iowa State University Research Foundation, Inc. | 766 |
1 |
| North Carolina State University | 1554 |
1 |
| Northeastern University | 537 |
1 |
| Oss Management Services (Pty) Limited | 3 |
1 |
| Pukyong National University Industry-University Cooperation Foundation | 333 |
1 |
| SK Innovation Co., Ltd. | 1303 |
1 |
| The South African Nuclear Energy Corporation Limited | 28 |
1 |
| ThyssenKrupp Steel Europe AG | 950 |
1 |
| Vale Inco Limited | 11 |
1 |
| Worcester Polytechnic Institute | 512 |
1 |
| Xiangguang Copper Co., Ltd. | 5 |
1 |
| FLSmidth A/S | 771 |
1 |
| Other owners | 7 |