- All sections
- D - Textilespaper
- D21H - Pulp compositionspreparation thereof not covered by subclasses , impregnating or coating of papertreatment of finished paper not covered by class or subclass paper not otherwise provided for
- D21H 23/32 - Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
Patent holdings for IPC class D21H 23/32
Total number of patents in this class: 31
10-year publication summary
|
2
|
2
|
1
|
1
|
1
|
6
|
2
|
1
|
2
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| WestRock MWV, LLC | 328 |
6 |
| Stora Enso Oyj | 1654 |
4 |
| Papierfabrik August Koehler SE | 40 |
2 |
| Vits Technology GmbH | 19 |
2 |
| Voith Patent GmbH | 2743 |
2 |
| Main Choice Paper Products Limited | 4 |
2 |
| 3m Innovative Properties Company | 17484 |
1 |
| Aramco Services Company | 4193 |
1 |
| BTG Ipi, LLC | 2 |
1 |
| Imerys Minerals Limited | 115 |
1 |
| Kinyosha Co., Ltd. | 21 |
1 |
| Metso Paper, Inc. | 335 |
1 |
| Nanjing University | 804 |
1 |
| OrganoClick AB | 70 |
1 |
| Saudi Arabian Oil Company | 14296 |
1 |
| Horst Sprenger GmbH | 2 |
1 |
| Kalykos LLC | 4 |
1 |
| Yunnan Yangrui Science and Technology Group Co., Ltd. | 1 |
1 |
| Nanjing Yimu Intelligent Technology Co., Ltd. | 39 |
1 |
| Other owners | 0 |