- All sections
- D - Textilespaper
- D21B - Fibrous raw materials or their mechanical treatment
- D21B 1/04 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
Patent holdings for IPC class D21B 1/04
Total number of patents in this class: 113
10-year publication summary
|
8
|
7
|
3
|
7
|
3
|
9
|
6
|
7
|
5
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Seiko Epson Corporation | 19253 |
5 |
| Domtar Paper Company, LLC | 121 |
5 |
| Metso Paper, Inc. | 447 |
4 |
| UPM-Kymmene Corporation | 930 |
4 |
| Stora Enso Oyj | 1599 |
3 |
| Weyerhaeuser NR Company | 332 |
3 |
| BASF SE | 20728 |
2 |
| API Intellectual Property Holdings, LLC | 77 |
2 |
| Biochemtex S.p.A. | 31 |
2 |
| Fiberlean Technologies Limited | 114 |
2 |
| Kemira Oyj | 1189 |
2 |
| M-real Oyj | 32 |
2 |
| Myllykoski Oyj | 3 |
2 |
| Nu-Wool Co., Inc. | 11 |
2 |
| Republic Services, Inc. | 5 |
2 |
| R.J. Reynolds Tobacco Company | 506 |
2 |
| Shen, Jennifer | 4 |
2 |
| UPM-Kymmene Oyj | 52 |
2 |
| Infinited Fiber Company Oy | 41 |
2 |
| Suzano S.A. | 196 |
2 |
| Other owners | 61 |