- 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: 258
10-year publication summary
|
25
|
11
|
16
|
19
|
21
|
14
|
16
|
27
|
16
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 500 |
26 |
| Metso Paper, Inc. | 428 |
24 |
| Stora Enso Oyj | 1616 |
19 |
| Andritz Technology and Asset Management GmbH | 90 |
13 |
| Andritz Oy | 282 |
8 |
| International Paper Company | 791 |
7 |
| University of Maine System Board of Trustees | 281 |
7 |
| UPM-Kymmene Corporation | 936 |
7 |
| Metsa Board Oyj | 53 |
6 |
| Metso Paper Sweden Aktiebolag | 44 |
5 |
| Andritz Inc. | 333 |
4 |
| Beta Renewables, S.p.A. | 25 |
4 |
| Voith Patent GmbH | 2754 |
4 |
| IFG Technologies, LLC | 8 |
4 |
| Valmet Technologies, Inc. | 6 |
4 |
| Kimberly-clark Worldwide, Inc. | 5509 |
3 |
| FPInnovations | 243 |
3 |
| Nippon Paper Industries Co., Ltd. | 826 |
3 |
| Södra Skogsägarna ekonomisk förening | 74 |
3 |
| List Technology AG | 45 |
3 |
| Other owners | 101 |