- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 11/10 - Concentrating spent liquor by evaporation
Patent holdings for IPC class D21C 11/10
Total number of patents in this class: 104
10-year publication summary
|
3
|
7
|
8
|
6
|
6
|
9
|
9
|
4
|
7
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 511 |
10 |
| Andritz Oy | 284 |
9 |
| Veolia Water Technologies, Inc. | 78 |
7 |
| Andritz Inc. | 332 |
5 |
| Ecolab USA Inc. | 5507 |
4 |
| Huntsman International LLC | 721 |
4 |
| Andritz AG | 233 |
3 |
| International Paper Company | 785 |
3 |
| Metso Power AB | 19 |
3 |
| Valmet Technologies Oy | 285 |
3 |
| Qilu University of Technology | 153 |
3 |
| Pierson Capital Environmental (Beijing) Limited | 10 |
3 |
| American Science and Technology Corporation | 4 |
2 |
| Dequest AG | 11 |
2 |
| Sunpine AB | 31 |
2 |
| UPM-Kymmene Corporation | 937 |
2 |
| Valmet Automation Oy | 112 |
2 |
| Diamond Power International, LLC | 57 |
2 |
| Papierholz Austria GmbH | 8 |
2 |
| Next Carbon Solutions, LLC | 40 |
2 |
| Other owners | 31 |