- 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: 435
10-year publication summary
|
41
|
34
|
40
|
17
|
26
|
19
|
35
|
34
|
31
|
18
|
| 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. | 275 |
15 |
| Yoshino Gypsum Co., Ltd. | 263 |
13 |
| Tokuyama Corporation | 1453 |
10 |
| Kemira Oyj | 1232 |
9 |
| ThyssenKrupp AG | 3458 |
9 |
| Knauf Gips KG | 633 |
8 |
| Research Institute of Industrial Science & Technology | 520 |
8 |
| ThyssenKrupp Industrial Solutions AG | 630 |
8 |
| Guangdong Brunp Recycling Technology Co., Ltd | 1248 |
7 |
| Hunan Brunp Recycling Technology Co., Ltd. | 1217 |
7 |
| Saudi Arabian Oil Company | 13949 |
7 |
| Mitsubishi Heavy Industries, Ltd. | 9020 |
6 |
| Kingenta Norsterra Chemical Co., Ltd. | 8 |
6 |
| POSCO Holdings Inc. | 379 |
6 |
| CertainTeed Gypsum, Inc. | 216 |
5 |
| Easymining Sweden AB | 69 |
5 |
| Innovator Energy LLC | 72 |
5 |
| Institute of Process Engineering, Chinese Academy of Sciences | 317 |
5 |
| Frontier Lithium Inc. | 11 |
5 |
| Avertana Limited | 12 |
5 |
| Other owners | 286 |