- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 21/46 - PurificationSeparation
Patent holdings for IPC class C01B 21/46
Total number of patents in this class: 40
10-year publication summary
|
3
|
1
|
2
|
1
|
7
|
4
|
6
|
5
|
4
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Yara International ASA | 841 |
10 |
| Casale SA | 608 |
6 |
| de Dietrich Process Systems GmbH | 20 |
3 |
| Hanwha Corporation | 297 |
2 |
| N2 Applied AS | 13 |
2 |
| Plinke GmbH | 19 |
2 |
| Clairion Ltd. | 8 |
2 |
| Asher Vitner Ltd. | 6 |
1 |
| Astom Corporation | 33 |
1 |
| Eyal Research Consultants Ltd | 8 |
1 |
| Fudan University | 681 |
1 |
| Royal Canadian Mint | 36 |
1 |
| Solvay SA | 996 |
1 |
| Covestro Intellectual Property GmbH & Co. KG | 275 |
1 |
| Limited Liability Company "innovative Chemical Engineering" | 1 |
1 |
| Wisdri Engineering & Research Incorporation Limited | 204 |
1 |
| Suzhou Jingzhou Equipment Technology Co., Ltd. | 10 |
1 |
| Lianshi New Material Corp., Ltd. | 8 |
1 |
| Green Advanced Technology Ltd. | 2 |
1 |
| Green Fine Technology Corp. | 2 |
1 |
| Other owners | 0 |