- 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 7/00 - Digesters
Patent holdings for IPC class D21C 7/00
Total number of patents in this class: 142
10-year publication summary
|
15
|
9
|
14
|
15
|
5
|
10
|
11
|
8
|
6
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 493 |
27 |
| Andritz Inc. | 338 |
9 |
| Metso Paper Sweden Aktiebolag | 44 |
9 |
| GPCP IP Holdings LLC | 1686 |
4 |
| Circ, Inc. | 38 |
4 |
| Andritz Oy | 277 |
3 |
| International Paper Company | 812 |
3 |
| King Abdulaziz University | 504 |
3 |
| Metso Fiber Karlstad AB | 20 |
3 |
| Solenis Technologies, L.P. | 317 |
3 |
| RGE Pte Ltd | 10 |
3 |
| Fibratech Pte. Ltd | 3 |
3 |
| Auburn University | 499 |
2 |
| Beta Renewables, S.p.A. | 25 |
2 |
| Ecolab USA Inc. | 5334 |
2 |
| Fibria Celulose S.A. | 16 |
2 |
| Licella Pty Limited | 29 |
2 |
| Neenah Gessner GmbH | 63 |
2 |
| Purevision Technology, LLC | 5 |
2 |
| Sekab E-Technology AB | 78 |
2 |
| Other owners | 52 |