- All sections
- C - Chemistrymetallurgy
- C01F - Compounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare earth metals
- C01F 11/18 - Carbonates
Patent holdings for IPC class C01F 11/18
Total number of patents in this class: 1093
10-year publication summary
|
66
|
71
|
78
|
52
|
49
|
63
|
77
|
97
|
94
|
76
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Omya International AG | 773 |
132 |
| Arelac, Inc. | 106 |
36 |
| Blue Planet Systems Corporation | 74 |
20 |
| Amorphical Ltd. | 64 |
18 |
| Shiraishi Kogyo Kaisha, Ltd. | 65 |
17 |
| Omya Development AG | 92 |
16 |
| Specialty Minerals (Michigan) Inc. | 225 |
16 |
| Kyushu University, National University Corporation | 1659 |
14 |
| Maruo Calcium Company Limited | 30 |
13 |
| The Regents of the University of California | 20035 |
12 |
| Shiraishi Central Laboratories Co., Ltd. | 23 |
11 |
| Mangrove Water Technologies Ltd. | 31 |
11 |
| Sumitomo Osaka Cement Co., Ltd. | 854 |
10 |
| Saudi Arabian Oil Company | 13316 |
9 |
| Shinko Sangyo Co., Ltd. | 19 |
9 |
| Stora Enso Oyj | 1650 |
9 |
| Coatex S.A.S. | 227 |
8 |
| Korea Institute of Geoscience and Mineral Resources | 239 |
8 |
| S.A. Lhoist Recherche et Developpement | 174 |
8 |
| Carbonfree Chemicals Holdings, LLC | 33 |
8 |
| Other owners | 708 |