- 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 11/12 - Combustion of pulp liquors
Patent holdings for IPC class D21C 11/12
Total number of patents in this class: 148
10-year publication summary
|
8
|
9
|
12
|
14
|
12
|
9
|
18
|
13
|
6
|
1
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Oy | 276 |
23 |
| Andritz Inc. | 344 |
13 |
| Valmet Technologies Oy | 284 |
13 |
| Varo Teollisuuspalvelut Oy | 13 |
8 |
| Huntsman International LLC | 708 |
7 |
| Veolia Water Technologies, Inc. | 80 |
6 |
| The Babcock & Wilcox Company | 184 |
5 |
| Boildec Oy | 6 |
5 |
| Chemrec Aktiebolag | 5 |
4 |
| Metso Power Oy | 38 |
4 |
| Valmet Automation Oy | 107 |
4 |
| Arkema France | 3790 |
3 |
| International Paper Company | 857 |
3 |
| UPM-Kymmene Corporation | 868 |
3 |
| Valmet AB | 463 |
3 |
| Teknik Support M. Bertilsson AB | 3 |
3 |
| Limearc Process AB | 3 |
3 |
| Cascades Canada ULC | 635 |
2 |
| M-real Oyj | 46 |
2 |
| Metso Power AB | 22 |
2 |
| Other owners | 32 |