- 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: 159
10-year publication summary
|
6
|
10
|
11
|
9
|
8
|
13
|
13
|
7
|
10
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Oy | 284 |
20 |
| Andritz Inc. | 332 |
14 |
| Valmet Technologies Oy | 285 |
13 |
| Varo Teollisuuspalvelut Oy | 13 |
8 |
| Huntsman International LLC | 721 |
7 |
| Veolia Water Technologies, Inc. | 78 |
7 |
| Limearc Process AB | 6 |
6 |
| Boildec Oy | 6 |
5 |
| Valmet Automation Oy | 112 |
5 |
| The Babcock & Wilcox Company | 148 |
4 |
| Chemrec Aktiebolag | 5 |
4 |
| Valmet AB | 511 |
4 |
| Arkema France | 4159 |
3 |
| International Paper Company | 785 |
3 |
| Metso Power Oy | 30 |
3 |
| UPM-Kymmene Corporation | 937 |
3 |
| Imam Mohammad Ibn Saud Islamic University | 125 |
3 |
| Cascades Canada ULC | 607 |
2 |
| M-real Oyj | 26 |
2 |
| Metso Power AB | 19 |
2 |
| Other owners | 41 |