- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 1/00 - Pretreatment of the finely-divided materials before digesting
Patent holdings for IPC class D21C 1/00
Total number of patents in this class: 148
10-year publication summary
|
20
|
3
|
7
|
6
|
3
|
4
|
5
|
1
|
7
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 514 |
15 |
| Iogen Energy Corporation | 90 |
6 |
| Sekab E-Technology AB | 78 |
6 |
| Battelle Energy Alliance, LLC | 587 |
5 |
| Renmatix, Inc. | 131 |
5 |
| Concordia University | 106 |
4 |
| UPM-Kymmene Corporation | 940 |
4 |
| Xyleco, Inc. | 195 |
4 |
| SixRing Inc. | 164 |
4 |
| Andritz Inc. | 333 |
3 |
| FPInnovations | 241 |
3 |
| Lenzing Aktiengesellschaft | 518 |
3 |
| Metso Paper Sweden Aktiebolag | 44 |
3 |
| Voith Patent GmbH | 2767 |
3 |
| Fibratech Pte. Ltd | 3 |
3 |
| Novozymes A/S | 3333 |
2 |
| Novozymes North America, Inc. | 126 |
2 |
| Georgia Tech Research Corporation | 2762 |
2 |
| Andritz AG | 234 |
2 |
| Bio-sep Limited | 7 |
2 |
| Other owners | 67 |