- All sections
- D - Textilespaper
- D21B - Fibrous raw materials or their mechanical treatment
- D21B 1/02 - Pretreatment of the raw materials by physical or chemical means
Patent holdings for IPC class D21B 1/02
Total number of patents in this class: 300
10-year publication summary
|
21
|
26
|
25
|
27
|
23
|
18
|
36
|
39
|
14
|
12
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Billerud AB | 169 |
16 |
| Seiko Epson Corporation | 20554 |
12 |
| Xyleco, Inc. | 186 |
12 |
| UPM-Kymmene Corporation | 1004 |
7 |
| Valmet AB | 569 |
7 |
| The Procter & Gamble Company | 21890 |
6 |
| Stora Enso Oyj | 1660 |
6 |
| Andritz AG | 249 |
5 |
| Andritz Inc. | 325 |
5 |
| Versalis S.P.A. | 529 |
5 |
| GranBio Intellectual Property Holdings, LLC | 125 |
5 |
| Beta Renewables, S.p.A. | 25 |
4 |
| Bouldin Corporation | 25 |
4 |
| Mascoma Canada Inc. | 12 |
4 |
| Metsa Board Oyj | 53 |
4 |
| IFG Technologies, LLC | 13 |
4 |
| Yi Chun Green Technology Co., Ltd. | 6 |
4 |
| BASF SE | 21334 |
3 |
| Anaergia Inc. | 106 |
3 |
| Board of Trustees of Michigan State University | 1244 |
3 |
| Other owners | 181 |