- All sections
- C - Chemistrymetallurgy
- C01F - Compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare earth metals
- C01F 11/46 - Sulfates
Patent holdings for IPC class C01F 11/46
Total number of patents in this class: 441
10-year publication summary
|
41
|
34
|
40
|
17
|
26
|
19
|
35
|
34
|
33
|
29
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Sakai Chemical Industry Co., Ltd. | 288 |
15 |
| Yoshino Gypsum Co., Ltd. | 271 |
12 |
| Tokuyama Corporation | 1506 |
10 |
| Kemira Oyj | 1266 |
9 |
| ThyssenKrupp AG | 3333 |
9 |
| Knauf Gips KG | 648 |
8 |
| Research Institute of Industrial Science & Technology | 574 |
8 |
| ThyssenKrupp Industrial Solutions AG | 630 |
8 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1273 |
7 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1227 |
7 |
| Innovator Energy LLC | 80 |
7 |
| Saudi Arabian Oil Company | 14398 |
7 |
| Mitsubishi Heavy Industries, Ltd. | 9252 |
6 |
| Kingenta Norsterra Chemical Co., Ltd. | 8 |
6 |
| POSCO Holdings Inc. | 696 |
6 |
| CertainTeed Gypsum, Inc. | 223 |
5 |
| Easymining Sweden AB | 73 |
5 |
| Institute of Process Engineering, Chinese Academy of Sciences | 331 |
5 |
| Prayon Technologies | 50 |
5 |
| Frontier Lithium Inc. | 11 |
5 |
| Other owners | 291 |