- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 9/18 - De-watering
Patent holdings for IPC class D21C 9/18
Total number of patents in this class: 262
10-year publication summary
|
22
|
11
|
12
|
16
|
17
|
13
|
15
|
22
|
16
|
10
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 511 |
26 |
| Metso Paper, Inc. | 421 |
24 |
| Stora Enso Oyj | 1648 |
20 |
| Andritz Technology and Asset Management GmbH | 89 |
13 |
| Andritz Oy | 284 |
9 |
| International Paper Company | 787 |
7 |
| University of Maine System Board of Trustees | 286 |
7 |
| UPM-Kymmene Corporation | 936 |
7 |
| Metsa Board Oyj | 53 |
6 |
| Metso Paper Sweden Aktiebolag | 44 |
5 |
| Andritz Inc. | 332 |
4 |
| Beta Renewables, S.p.A. | 25 |
4 |
| Voith Patent GmbH | 2764 |
4 |
| IFG Technologies, LLC | 8 |
4 |
| Valmet Technologies, Inc. | 6 |
4 |
| Kimberly-clark Worldwide, Inc. | 5499 |
3 |
| FPInnovations | 242 |
3 |
| Nippon Paper Industries Co., Ltd. | 833 |
3 |
| Södra Skogsägarna ekonomisk förening | 75 |
3 |
| List Technology AG | 46 |
3 |
| Other owners | 103 |