- 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 11/00 - Regeneration of pulp liquors
Patent holdings for IPC class D21C 11/00
Total number of patents in this class: 681
10-year publication summary
|
71
|
80
|
76
|
49
|
64
|
62
|
52
|
36
|
42
|
5
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Andritz Oy | 276 |
43 |
| Valmet AB | 463 |
40 |
| UPM-Kymmene Corporation | 868 |
28 |
| Valmet Technologies Oy | 284 |
25 |
| Stora Enso Oyj | 1504 |
17 |
| FPInnovations | 259 |
13 |
| Virdia, LLC | 44 |
13 |
| SCA Forest Products AB | 86 |
12 |
| GranBio Intellectual Property Holdings, LLC | 105 |
10 |
| Andritz Inc. | 344 |
9 |
| Metsa Fibre Oy | 30 |
9 |
| Pierson Capital Environmental (Beijing) Limited | 9 |
8 |
| Licella Pty Limited | 29 |
7 |
| Veolia Water Technologies, Inc. | 80 |
7 |
| Voith Patent GmbH | 2727 |
7 |
| Canfor Pulp Ltd. | 17 |
6 |
| Lenzing Aktiengesellschaft | 529 |
6 |
| Suzano S.A. | 181 |
6 |
| Carbon Engineering ULC | 27 |
6 |
| Shell Oil Company | 2196 |
5 |
| Other owners | 404 |