- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 3/24 - Continuous processes
Patent holdings for IPC class D21C 3/24
Total number of patents in this class: 81
10-year publication summary
|
13
|
1
|
5
|
7
|
5
|
5
|
0
|
0
|
3
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 556 |
21 |
| Metso Fiber Karlstad AB | 16 |
10 |
| Metso Paper Sweden Aktiebolag | 44 |
9 |
| Novozymes A/S | 3388 |
4 |
| Andritz Inc. | 324 |
3 |
| Andritz Oy | 293 |
3 |
| GP Cellulose GmbH | 86 |
3 |
| Nippon Paper Industries Co., Ltd. | 853 |
3 |
| Renmatix, Inc. | 132 |
2 |
| RISE Research Institutes of Sweden AB | 58 |
2 |
| RISE Innventia AB | 15 |
2 |
| BASF SE | 21320 |
1 |
| Auburn University | 497 |
1 |
| Buckman Laboratories International, Inc. | 240 |
1 |
| Chlorine Engineers Corp., Ltd. | 24 |
1 |
| de Nora Permelec Ltd | 164 |
1 |
| Ecole Polytechnique Federale de Lausanne (epfl) | 1614 |
1 |
| FPInnovations | 224 |
1 |
| Geophia LLC | 9 |
1 |
| Permelec Electrode Ltd. | 19 |
1 |
| Other owners | 10 |