- All sections
- D - Textiles; paper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materials; regeneration of pulping liquors; apparatus 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: 153
10-year publication summary
9
|
26
|
6
|
9
|
9
|
6
|
6
|
10
|
1
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Valmet AB | 463 |
11 |
Iogen Energy Corporation | 100 |
6 |
Sekab E-Technology AB | 79 |
6 |
SixRing Inc. | 121 |
6 |
Battelle Energy Alliance, LLC | 569 |
5 |
Renmatix, Inc. | 132 |
5 |
Andritz Inc. | 344 |
4 |
Concordia University | 95 |
4 |
Xyleco, Inc. | 217 |
4 |
Novozymes North America, Inc. | 150 |
3 |
FPInnovations | 259 |
3 |
Lenzing Aktiengesellschaft | 529 |
3 |
Metso Paper Sweden Aktiebolag | 48 |
3 |
UPM-Kymmene Corporation | 868 |
3 |
Voith Patent GmbH | 2727 |
3 |
Fibratech Pte. Ltd | 3 |
3 |
Novozymes A/S | 3314 |
2 |
Georgia Tech Research Corporation | 2453 |
2 |
Andritz AG | 218 |
2 |
Bio-sep Limited | 8 |
2 |
Other owners | 73 |