- 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 19/56 - Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
Patent holdings for IPC class D21H 19/56
Total number of patents in this class: 160
10-year publication summary
|
14
|
14
|
13
|
11
|
10
|
14
|
9
|
11
|
10
|
4
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| WestRock MWV, LLC | 330 |
14 |
| BASF SE | 21151 |
9 |
| Stora Enso Oyj | 1633 |
9 |
| Kemira Oyj | 1241 |
8 |
| Coatex S.A.S. | 213 |
4 |
| Oji Holdings Corporation | 781 |
4 |
| Omya International AG | 775 |
4 |
| Ahlstrom Oyj | 194 |
4 |
| Hewlett-Packard Development Company, L.P. | 25337 |
3 |
| Rohm and Haas Company | 2945 |
3 |
| Dow Global Technologies LLC | 10824 |
3 |
| Agfa-Gevaert | 297 |
3 |
| Cascades Sonoco Inc. | 26 |
3 |
| Nippon Paper Industries Co., Ltd. | 841 |
3 |
| Koehler Innovation & Technology GmbH | 54 |
3 |
| FUJIFILM Corporation | 30296 |
2 |
| Bioastra Technologies Inc. | 11 |
2 |
| Celanese International Corporation | 912 |
2 |
| COATEX une société par actions simplifiée | 173 |
2 |
| Coldenhove Know How B.V. | 9 |
2 |
| Other owners | 73 |