- All sections
- D - Textiles; paper
- D21H - Pulp compositions; preparation thereof not covered by subclasses , ; impregnating or coating of paper; treatment 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: 317
10-year publication summary
|
20
|
28
|
32
|
35
|
25
|
23
|
37
|
28
|
43
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| WestRock MWV, LLC | 341 |
43 |
| Stora Enso Oyj | 1605 |
15 |
| Omya International AG | 810 |
14 |
| Hewlett-Packard Development Company, L.P. | 27473 |
9 |
| Kemira Oyj | 1208 |
8 |
| Oji Holdings Corporation | 701 |
8 |
| Mitsubishi Paper Mills Limited | 234 |
7 |
| Billerud AB | 99 |
6 |
| BASF Corporation | 1822 |
5 |
| GRUPPO CORDENONS S.p.A. | 66 |
5 |
| Neenah Gessner GmbH | 63 |
5 |
| Nippon Paper Industries Co., Ltd. | 809 |
5 |
| Imertech SAS | 226 |
5 |
| Billerudkorsnas AB | 91 |
4 |
| Fiberlean Technologies Limited | 119 |
4 |
| Imerys Minerals Limited | 129 |
4 |
| International Paper Company | 815 |
4 |
| Graphic Packaging International, LLC | 1430 |
4 |
| Société des Produits Nestlé S.A. | 9243 |
3 |
| Akzo Nobel Chemicals International B.V. | 480 |
3 |
| Other owners | 156 |