- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 7/00 - Digesters
Patent holdings for IPC class D21C 7/00
Total number of patents in this class: 131
10-year publication summary
|
9
|
14
|
15
|
5
|
10
|
11
|
9
|
7
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 557 |
27 |
| Metso Paper Sweden Aktiebolag | 44 |
9 |
| Andritz Inc. | 325 |
8 |
| Circ, Inc. | 38 |
5 |
| GPCP IP Holdings LLC | 1529 |
4 |
| Andritz Oy | 294 |
3 |
| King Abdulaziz University | 522 |
3 |
| Sekab E-Technology AB | 67 |
3 |
| Solenis Technologies, L.P. | 304 |
3 |
| Fibratech Pte. Ltd | 3 |
3 |
| Beta Renewables, S.p.A. | 25 |
2 |
| Ecolab USA Inc. | 5826 |
2 |
| International Paper Company | 598 |
2 |
| Metso Fiber Karlstad AB | 16 |
2 |
| Neenah Gessner GmbH | 95 |
2 |
| UPM-Kymmene Corporation | 1004 |
2 |
| RGE Pte Ltd | 7 |
2 |
| Nova Pangaea Technologies (UK) Limited | 12 |
2 |
| Papierholz Austria GmbH | 7 |
2 |
| Pierson Capital Environmental (Beijing) Limited | 11 |
2 |
| Other owners | 43 |