- 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: 47
10-year publication summary
|
3
|
6
|
3
|
3
|
3
|
4
|
4
|
7
|
3
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2759 |
8 |
| Stora Enso Oyj | 1646 |
7 |
| GranBio Intellectual Property Holdings, LLC | 126 |
5 |
| Cmblu Energy AG | 56 |
4 |
| GPCP IP Holdings LLC | 1616 |
3 |
| Billerudkorsnas AB | 88 |
2 |
| Cellucomp Limited | 40 |
2 |
| Cosun Biobased Products B.V. | 5 |
2 |
| International Paper Company | 746 |
2 |
| Novozymes A/S | 3334 |
1 |
| Billerud AB | 143 |
1 |
| Domsjö Fabriker AB | 7 |
1 |
| Eastman Chemical Company | 2103 |
1 |
| Finch Paper LLC | 7 |
1 |
| Godavari Biorefineries Limited | 40 |
1 |
| Lenzing Aktiengesellschaft | 513 |
1 |
| South China University of Technology | 1835 |
1 |
| Cmblu Projektag | 1 |
1 |
| Ameriasia Activated Carbon Products Co., Ltd. | 2 |
1 |
| Institut National de Recherche pour L'agriculture L'alimentation et l'Environnement | 523 |
1 |
| Other owners | 1 |