- All sections
- D - Textiles; paper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; regeneration of pulping liquors; apparatus therefor
- D21C 11/10 - Concentrating spent liquor by evaporation
Patent holdings for IPC class D21C 11/10
Total number of patents in this class: 93
10-year publication summary
|
15
|
4
|
7
|
13
|
7
|
7
|
12
|
8
|
4
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 463 |
11 |
| Andritz Oy | 276 |
9 |
| Veolia Water Technologies, Inc. | 80 |
6 |
| Andritz Inc. | 344 |
4 |
| Huntsman International LLC | 708 |
4 |
| Andritz AG | 218 |
3 |
| The Babcock & Wilcox Company | 184 |
3 |
| Ecolab USA Inc. | 5190 |
3 |
| International Paper Company | 857 |
3 |
| Metso Power AB | 22 |
3 |
| Valmet Technologies Oy | 284 |
3 |
| Qilu University of Technology | 154 |
3 |
| Dequest AG | 11 |
2 |
| Sunpine AB | 29 |
2 |
| UPM-Kymmene Corporation | 868 |
2 |
| Valmet Automation Oy | 107 |
2 |
| Papierholz Austria GmbH | 8 |
2 |
| Siemens AG | 24990 |
1 |
| Commissariat à l'énergie atomique et aux energies alternatives | 10525 |
1 |
| American Science and Technology Corporation | 3 |
1 |
| Other owners | 25 |