- 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: 29
10-year publication summary
|
1
|
1
|
2
|
1
|
1
|
2
|
1
|
6
|
5
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| ATI Properties LLC | 203 |
2 |
| Technological Resources Pty. Limited | 446 |
2 |
| William Marsh Rice University | 977 |
2 |
| China ENFI Engineering Corp. | 99 |
2 |
| The Trustees of Columbia University in the City of New York | 3532 |
1 |
| Battelle Memorial Institute | 2425 |
1 |
| Gem Co., Ltd. | 111 |
1 |
| Iowa State University Research Foundation, Inc. | 752 |
1 |
| North Carolina State University | 1537 |
1 |
| Northeastern University | 526 |
1 |
| Oss Management Services (Pty) Limited | 3 |
1 |
| Pukyong National University Industry-University Cooperation Foundation | 316 |
1 |
| The South African Nuclear Energy Corporation Limited | 28 |
1 |
| ThyssenKrupp Steel Europe AG | 957 |
1 |
| Vale Inco Limited | 11 |
1 |
| Xiangguang Copper Co., Ltd. | 5 |
1 |
| FLSmidth A/S | 845 |
1 |
| Carbon Holdings Intellectual Properties, LLC | 57 |
1 |
| Platinum Group Chile SpA | 3 |
1 |
| Pure Lithium Corporation | 35 |
1 |
| Other owners | 5 |