- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 5/22 - Purification of the pulp suspension by mechanical meansApparatus therefor with the aid of centrifugal force in apparatus with a vertical axis
Patent holdings for IPC class D21D 5/22
Total number of patents in this class: 4
10-year publication summary
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0
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0
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1
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0
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| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2759 |
4 |
| Other owners | 0 |