- 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 11/06 - Treatment of pulp gases; Recovery of the heat content of the gases
Patent holdings for IPC class D21C 11/06
Total number of patents in this class: 80
10-year publication summary
|
2
|
4
|
6
|
12
|
16
|
7
|
7
|
3
|
4
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Oy | 276 |
19 |
| Valmet AB | 463 |
11 |
| Valmet Technologies Oy | 284 |
11 |
| Huntsman International LLC | 708 |
5 |
| A.H. Lundberg Systems Limited | 5 |
4 |
| Andritz Inc. | 344 |
4 |
| Veolia Water Technologies, Inc. | 80 |
4 |
| Metso Power AB | 22 |
3 |
| FPInnovations | 259 |
2 |
| Valmet Automation Oy | 107 |
2 |
| Chemrec Aktiebolag | 5 |
1 |
| Guangxi University | 66 |
1 |
| L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude | 3515 |
1 |
| Lakehead University | 58 |
1 |
| Meri Environmental Solutions GmbH | 43 |
1 |
| Metso Fiber Karlstad AB | 20 |
1 |
| Nalco Company | 620 |
1 |
| Neste Oyj | 686 |
1 |
| NORAM Engineering and Constructors Ltd. | 27 |
1 |
| Shandong Tralin Paper Co., Ltd | 6 |
1 |
| Other owners | 5 |