- All sections
- C - Chemistrymetallurgy
- C01B - Non-metallic elementscompounds thereof
- C01B 17/62 - Methods of preparing sulfites in general
Patent holdings for IPC class C01B 17/62
Total number of patents in this class: 15
10-year publication summary
|
6
|
1
|
0
|
3
|
0
|
0
|
0
|
1
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Tessenderlo Kerley, Inc. | 129 |
3 |
| Eagle US 2 LLC | 80 |
2 |
| Hydro Technologies (Canada), Inc. a Canadian Corporation | 1 |
1 |
| Johannes Gutenberg-universitat Mainz | 133 |
1 |
| Nanjing Tech University | 299 |
1 |
| NCH Corporation | 248 |
1 |
| Phillips 66 Company | 1016 |
1 |
| Plant Food Systems, Inc. | 53 |
1 |
| Jiangsu Deyitong Environmental Protection Technology Co., Ltd. | 9 |
1 |
| Nanjing Gekof Institute of Environmental Protection Technology & Equipment Co., Ltd. | 16 |
1 |
| Nanjing Liuyan Environmental Protection Technology Co., Ltd. | 7 |
1 |
| Silox Canada Inc. | 4 |
1 |
| Other owners | 0 |