- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 9/06 - Washing in filters
Patent holdings for IPC class D21C 9/06
Total number of patents in this class: 95
10-year publication summary
|
4
|
4
|
5
|
4
|
4
|
5
|
3
|
1
|
1
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Metso Paper, Inc. | 333 |
27 |
| Valmet AB | 556 |
17 |
| Stora Enso Oyj | 1657 |
6 |
| Andritz Inc. | 324 |
5 |
| CNH Industrial Canada, Ltd. | 956 |
4 |
| Metso Paper Sweden Aktiebolag | 44 |
4 |
| Valmet Technologies, Inc. | 4 |
4 |
| Andritz Oy | 293 |
3 |
| Solenis Technologies, L.P. | 304 |
2 |
| Valmet Technologies, Inc. | 136 |
2 |
| Shin-Etsu Chemical Co., Ltd. | 6120 |
1 |
| Buckman Laboratories International, Inc. | 240 |
1 |
| Eastman Chemical Company | 2094 |
1 |
| Ecolab USA Inc. | 5813 |
1 |
| Nijhuis Water Technology B.V. | 13 |
1 |
| Papyrus Australia Limited | 3 |
1 |
| Rioks Patenter AB | 2 |
1 |
| Sulzer Management AG | 712 |
1 |
| United Arab Emirates University | 387 |
1 |
| The University of Chicago | 1500 |
1 |
| Other owners | 11 |