- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 11/06 - Treatment of pulp gasesRecovery of the heat content of the gases
Patent holdings for IPC class D21C 11/06
Total number of patents in this class: 81
10-year publication summary
|
4
|
5
|
8
|
11
|
6
|
4
|
3
|
4
|
3
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Oy | 284 |
19 |
| Valmet Technologies Oy | 285 |
12 |
| Valmet AB | 508 |
10 |
| Huntsman International LLC | 721 |
5 |
| A.H. Lundberg Systems Limited | 5 |
4 |
| Andritz Inc. | 331 |
4 |
| Veolia Water Technologies, Inc. | 78 |
4 |
| Metso Power AB | 19 |
3 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3985 |
2 |
| Valmet Automation Oy | 111 |
2 |
| Chemrec Aktiebolag | 5 |
1 |
| FPInnovations | 242 |
1 |
| Guangxi University | 83 |
1 |
| Lakehead University | 65 |
1 |
| Meri Environmental Solutions GmbH | 42 |
1 |
| Metso Fiber Karlstad AB | 19 |
1 |
| Nalco Company | 573 |
1 |
| Neste Oyj | 789 |
1 |
| NORAM Engineering and Constructors Ltd. | 29 |
1 |
| Shandong Tralin Paper Co., Ltd | 6 |
1 |
| Other owners | 6 |