- 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 23/30 - Pretreatment of the paper
Patent holdings for IPC class D21H 23/30
Total number of patents in this class: 20
10-year publication summary
|
2
|
0
|
0
|
5
|
2
|
4
|
1
|
1
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Voith Patent GmbH | 2771 |
3 |
| WestRock MWV, LLC | 330 |
3 |
| Seiko Epson Corporation | 20043 |
2 |
| Société des Produits Nestlé S.A. | 10009 |
1 |
| Xerox Corporation | 4709 |
1 |
| Brown LLC | 79 |
1 |
| Coatex S.A.S. | 213 |
1 |
| Ecolab USA Inc. | 5745 |
1 |
| EXCOR Korrosionsforschung GmbH | 3 |
1 |
| Nippon Paper Industries Co., Ltd. | 841 |
1 |
| Nissin Foods Holdings Co., Ltd. | 553 |
1 |
| Universita degli Studi di Milano-bicocca | 152 |
1 |
| Qilu University of Technology | 153 |
1 |
| Foshan XinFei Hygiene Materials Co., Ltd. | 1 |
1 |
| Shanghai Jinxing Package Material Co., Ltd | 2 |
1 |
| Other owners | 0 |