- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 11/12 - Combustion of pulp liquors
Patent holdings for IPC class D21C 11/12
Total number of patents in this class: 161
10-year publication summary
|
12
|
14
|
12
|
9
|
18
|
14
|
10
|
14
|
9
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Oy | 294 |
21 |
| Andritz Inc. | 325 |
15 |
| Valmet Technologies Oy | 289 |
12 |
| Limearc Process AB | 11 |
9 |
| Veolia Water Technologies, Inc. | 82 |
8 |
| Varo Teollisuuspalvelut Oy | 13 |
8 |
| Huntsman International LLC | 692 |
7 |
| Boildec Oy | 6 |
5 |
| Valmet Automation Oy | 112 |
5 |
| The Babcock & Wilcox Company | 139 |
4 |
| Valmet AB | 557 |
4 |
| Chemrec Aktiebolag | 4 |
3 |
| International Paper Company | 598 |
3 |
| Metso Power Oy | 27 |
3 |
| UPM-Kymmene Corporation | 1004 |
3 |
| Imam Mohammad Ibn Saud Islamic University | 234 |
3 |
| Commissariat à l'énergie atomique et aux energies alternatives | 11128 |
2 |
| Arkema France | 4254 |
2 |
| Cascades Canada ULC | 586 |
2 |
| Metso Power AB | 18 |
2 |
| Other owners | 40 |