- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 9/02 - Washing
Patent holdings for IPC class D21C 9/02
Total number of patents in this class: 188
10-year publication summary
|
16
|
12
|
17
|
8
|
14
|
16
|
16
|
16
|
6
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 556 |
19 |
| Andritz Inc. | 324 |
11 |
| Andritz Oy | 293 |
7 |
| Ecolab USA Inc. | 5813 |
6 |
| GP Cellulose GmbH | 86 |
5 |
| ICM, Inc. | 89 |
4 |
| Metso Paper Sweden Aktiebolag | 44 |
4 |
| Packaging Corporation of America | 52 |
4 |
| Södra Skogsägarna ekonomisk förening | 81 |
4 |
| Solenis Technologies, L.P. | 304 |
4 |
| Stora Enso Oyj | 1657 |
4 |
| Sulzer Management AG | 712 |
4 |
| UPM-Kymmene Corporation | 1005 |
4 |
| Buckman Laboratories International, Inc. | 240 |
3 |
| Celanese International Corporation | 912 |
3 |
| Jena Trading ApS | 12 |
3 |
| Qilu University of Technology | 153 |
3 |
| Imam Mohammad Ibn Saud Islamic University | 234 |
3 |
| Kimberly-clark Worldwide, Inc. | 5261 |
2 |
| Centre National de La Recherche Scientifique | 11059 |
2 |
| Other owners | 89 |