- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 11/06 - Sulfite or bisulfite pulp
Patent holdings for IPC class D21H 11/06
Total number of patents in this class: 50
10-year publication summary
|
3
|
6
|
3
|
3
|
3
|
4
|
4
|
7
|
3
|
6
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Stora Enso Oyj | 1660 |
8 |
| Voith Patent GmbH | 2742 |
5 |
| GranBio Intellectual Property Holdings, LLC | 125 |
5 |
| Billerud AB | 163 |
4 |
| Cmblu Energy AG | 58 |
4 |
| GPCP IP Holdings LLC | 1531 |
3 |
| Billerudkorsnas AB | 88 |
2 |
| Cellucomp Limited | 38 |
2 |
| Cosun Biobased Products B.V. | 5 |
2 |
| International Paper Company | 598 |
2 |
| Novozymes A/S | 3388 |
1 |
| Domsjö Fabriker AB | 7 |
1 |
| Eastman Chemical Company | 2097 |
1 |
| Finch Paper LLC | 7 |
1 |
| Godavari Biorefineries Limited | 42 |
1 |
| Lenzing Aktiengesellschaft | 499 |
1 |
| Mondi AG | 217 |
1 |
| SAPPI Netherlands Services B.V. | 37 |
1 |
| South China University of Technology | 1916 |
1 |
| Cmblu Projektag | 1 |
1 |
| Other owners | 3 |