- 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 19/40 - Coatings with pigments characterised by the pigments siliceous, e.g. clays
Patent holdings for IPC class D21H 19/40
Total number of patents in this class: 336
10-year publication summary
|
25
|
28
|
33
|
23
|
21
|
33
|
28
|
42
|
26
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| WestRock MWV, LLC | 335 |
42 |
| Omya International AG | 768 |
14 |
| Stora Enso Oyj | 1648 |
14 |
| Billerud AB | 144 |
12 |
| Oji Holdings Corporation | 757 |
10 |
| Hewlett-Packard Development Company, L.P. | 25454 |
9 |
| Kemira Oyj | 1231 |
8 |
| Mitsubishi Paper Mills Limited | 229 |
6 |
| Nippon Paper Industries Co., Ltd. | 833 |
6 |
| Koehler Innovation & Technology GmbH | 50 |
6 |
| GRUPPO CORDENONS S.p.A. | 48 |
5 |
| Neenah Gessner GmbH | 81 |
5 |
| BASF Corporation | 1695 |
4 |
| Billerudkorsnas AB | 88 |
4 |
| Imerys Minerals Limited | 116 |
4 |
| Specialty Minerals (Michigan) Inc. | 229 |
4 |
| Sun Chemical Corporation | 828 |
4 |
| UNILIN, besloten vennootschap | 938 |
4 |
| Société des Produits Nestlé S.A. | 9926 |
3 |
| Akzo Nobel Chemicals International B.V. | 428 |
3 |
| Other owners | 169 |