- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 5/20 - Waste heat recovery
Patent holdings for IPC class D21F 5/20
Total number of patents in this class: 60
10-year publication summary
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1
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5
|
1
|
2
|
3
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2
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3
|
2
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3
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2764 |
19 |
| Siemens AG | 24437 |
6 |
| Valmet AB | 511 |
4 |
| Structured I, LLC | 58 |
3 |
| Valmet S.p.A. | 15 |
3 |
| Siemens Energy Global GmbH & Co. KG | 2987 |
3 |
| Andritz Ltd. | 17 |
2 |
| CMPC Tissue S.A. | 18 |
2 |
| Metso Paper, Inc. | 421 |
2 |
| TM System Finland Oy | 9 |
2 |
| The Procter & Gamble Company | 22045 |
1 |
| Seiko Epson Corporation | 19425 |
1 |
| Andritz AG | 233 |
1 |
| James Cropper Plc | 13 |
1 |
| Johns Manville | 959 |
1 |
| Novimpianti Drying Technology S.r.l. | 1 |
1 |
| SCA Hygiene Products AB | 655 |
1 |
| Kadant Johnson LLC | 28 |
1 |
| Essity Hygiene and Health Aktiebolag | 2045 |
1 |
| Hayat Ki̇mya Sanayi̇ Anoni̇m Şi̇rketi̇ | 97 |
1 |
| Other owners | 4 |