- All sections
- D - Textilespaper
- D21D - Treatment of the materials before passing to the paper-making machine
- D21D 5/00 - Purification of the pulp suspension by mechanical meansApparatus therefor
Patent holdings for IPC class D21D 5/00
Total number of patents in this class: 36
10-year publication summary
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1
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1
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3
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2
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0
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3
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0
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1
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3
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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 | 2764 |
4 |
| Andritz Inc. | 332 |
3 |
| FPInnovations | 242 |
3 |
| NORAM Engineering and Constructors Ltd. | 29 |
3 |
| Valmet AB | 511 |
3 |
| API Intellectual Property Holdings, LLC | 78 |
2 |
| Stora Enso Oyj | 1648 |
2 |
| Seiko Epson Corporation | 19425 |
1 |
| Billerudkorsnas AB | 87 |
1 |
| Chempolis Oy | 26 |
1 |
| Consejo Superior de Investigaciones Cientificas (csic) | 1370 |
1 |
| Domsjö Fabriker AB | 7 |
1 |
| Hunan University | 153 |
1 |
| Metso Paper, Inc. | 421 |
1 |
| Oji Holdings Corporation | 724 |
1 |
| Outotec Oyj | 278 |
1 |
| The United States of America, as represented by the Secretary of Agriculture | 1101 |
1 |
| UPM-Kymmene Corporation | 936 |
1 |
| Biltube India Limited | 1 |
1 |
| Papierholz Austria GmbH | 8 |
1 |
| Other owners | 3 |