- 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: 328
10-year publication summary
|
16
|
25
|
28
|
33
|
23
|
21
|
33
|
28
|
42
|
26
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| WestRock MWV, LLC | 341 |
42 |
| Stora Enso Oyj | 1665 |
15 |
| Omya International AG | 770 |
14 |
| Billerud AB | 140 |
11 |
| Oji Holdings Corporation | 744 |
10 |
| Hewlett-Packard Development Company, L.P. | 25585 |
9 |
| Kemira Oyj | 1222 |
8 |
| Mitsubishi Paper Mills Limited | 227 |
6 |
| Nippon Paper Industries Co., Ltd. | 833 |
6 |
| Koehler Innovation & Technology GmbH | 49 |
6 |
| GRUPPO CORDENONS S.p.A. | 48 |
5 |
| Neenah Gessner GmbH | 73 |
5 |
| BASF Corporation | 1708 |
4 |
| Billerudkorsnas AB | 88 |
4 |
| Imerys Minerals Limited | 117 |
4 |
| Sun Chemical Corporation | 830 |
4 |
| UNILIN, besloten vennootschap | 905 |
4 |
| Société des Produits Nestlé S.A. | 9886 |
3 |
| Akzo Nobel Chemicals International B.V. | 433 |
3 |
| delfortgroup AG | 151 |
3 |
| Other owners | 162 |