- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 5/18 - Drying webs by hot air
Patent holdings for IPC class D21F 5/18
Total number of patents in this class: 328
10-year publication summary
|
17
|
32
|
36
|
25
|
24
|
26
|
22
|
25
|
18
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2747 |
48 |
| Valmet AB | 554 |
40 |
| Kimberly-clark Worldwide, Inc. | 5305 |
25 |
| The Procter & Gamble Company | 21849 |
21 |
| Andritz Technology and Asset Management GmbH | 78 |
18 |
| Andritz AG | 244 |
16 |
| Metso Paper, Inc. | 338 |
13 |
| Toscotec S.p.A. | 40 |
11 |
| GPCP IP Holdings LLC | 1530 |
11 |
| First Quality Tissue, LLC | 164 |
10 |
| A. Celli Paper S.p.A. | 20 |
9 |
| Stora Enso Oyj | 1650 |
8 |
| Structured I, LLC | 62 |
8 |
| Buckman Laboratories International, Inc. | 240 |
7 |
| Ecolab USA Inc. | 5803 |
6 |
| Valmet S.p.A. | 15 |
6 |
| Valmet, Inc. | 47 |
5 |
| Andritz Pulp & Paper Italy S.r.l. | 12 |
5 |
| Daio Paper Corporation | 1409 |
4 |
| Albany International Corp. | 231 |
3 |
| Other owners | 54 |