- All sections
- D - Textilespaper
- D21C - Production of cellulose by removing non-cellulose substances from cellulose- containing materialsregeneration of pulping liquorsapparatus therefor
- D21C 11/02 - Regeneration of pulp liquors of sulfite lye
Patent holdings for IPC class D21C 11/02
Total number of patents in this class: 24
10-year publication summary
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0
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0
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0
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3
|
2
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2
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2
|
3
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1
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0
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Valmet AB | 557 |
4 |
| FPInnovations | 224 |
3 |
| Paques I.P. B.V. | 69 |
2 |
| Stora Enso Oyj | 1660 |
2 |
| GranBio Intellectual Property Holdings, LLC | 125 |
2 |
| Suzano S.A. | 193 |
2 |
| Beijing Insight Biomass LLC | 3 |
1 |
| Borregaard AS | 127 |
1 |
| Chemrec Aktiebolag | 4 |
1 |
| Domsjö Fabriker AB | 7 |
1 |
| Kurita Water Industries Ltd. | 1292 |
1 |
| Shandong Tralin Paper Co., Ltd | 6 |
1 |
| South China University of Technology | 1920 |
1 |
| Tembec Industries Inc. | 1 |
1 |
| Suncarbon AB | 8 |
1 |
| Other owners | 0 |