- All sections
- D - Textilespaper
- D21F - Paper-making machinesmethods of producing paper thereon
- D21F 1/66 - Pulp catching, de-watering, or recoveringRe-use of pulp-water
Patent holdings for IPC class D21F 1/66
Total number of patents in this class: 133
10-year publication summary
|
6
|
4
|
11
|
7
|
2
|
8
|
13
|
2
|
11
|
7
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2754 |
38 |
| Kimberly-clark Worldwide, Inc. | 5509 |
7 |
| Stora Enso Oyj | 1616 |
7 |
| Valmet AB | 500 |
7 |
| Kurita Water Industries Ltd. | 1187 |
6 |
| Andritz Oy | 282 |
4 |
| Essity Hygiene and Health Aktiebolag | 2026 |
4 |
| Seiko Epson Corporation | 19281 |
3 |
| First Quality Tissue, LLC | 156 |
3 |
| Runtech Systems Oy | 24 |
3 |
| Structured I, LLC | 57 |
3 |
| Chevron U.S.A. Inc. | 3939 |
2 |
| Ichikawa Co., Ltd. | 104 |
2 |
| Kemira Oyj | 1197 |
2 |
| Metso Paper, Inc. | 428 |
2 |
| Metso Paper Karlstad AB | 9 |
2 |
| Solenis Technologies, L.P. | 331 |
2 |
| UPM-Kymmene Corporation | 936 |
2 |
| Valmet Technologies, Inc. | 147 |
2 |
| GPCP IP Holdings LLC | 1642 |
2 |
| Other owners | 30 |