- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 1/40 - Washing the fibres
Patent holdings for IPC class D21D 1/40
Total number of patents in this class: 34
10-year publication summary
|
1
|
0
|
2
|
0
|
2
|
1
|
3
|
0
|
0
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Metso Paper, Inc. | 331 |
8 |
| Valmet AB | 557 |
7 |
| Metso Paper Sweden Aktiebolag | 44 |
5 |
| Andritz Oy | 294 |
3 |
| Andritz Inc. | 325 |
2 |
| MDF Recovery Limited | 4 |
2 |
| Valmet Technologies, Inc. | 4 |
2 |
| Cotton Incorporated | 57 |
1 |
| Jiangnan University | 1639 |
1 |
| North Carolina State University | 1599 |
1 |
| Valmet Technologies, Inc. | 134 |
1 |
| Voith Patent GmbH | 2742 |
1 |
| Other owners | 0 |