- 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 19/38 - Coatings with pigments characterised by the pigments
Patent holdings for IPC class D21H 19/38
Total number of patents in this class: 515
10-year publication summary
|
44
|
53
|
42
|
45
|
40
|
37
|
36
|
37
|
18
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Omya International AG | 774 |
81 |
| WestRock MWV, LLC | 338 |
42 |
| Fiberlean Technologies Limited | 114 |
21 |
| Nippon Paper Industries Co., Ltd. | 832 |
18 |
| Mitsubishi Paper Mills Limited | 232 |
17 |
| Hewlett-Packard Development Company, L.P. | 25895 |
11 |
| FP-Pigments Oy | 31 |
11 |
| Kemira Oyj | 1206 |
11 |
| Stora Enso Oyj | 1636 |
11 |
| Billerud AB | 125 |
10 |
| Omya Development AG | 92 |
9 |
| Billerudkorsnas AB | 88 |
8 |
| Coatex S.A.S. | 227 |
7 |
| Imerys Minerals Limited | 118 |
6 |
| International Paper Company | 788 |
6 |
| ALPHA Calcit Fullstoff Gesellschaft mbH | 14 |
4 |
| Arjowiggins Security | 126 |
4 |
| delfortgroup AG | 150 |
4 |
| Oji Holdings Corporation | 720 |
4 |
| Voith Patent GmbH | 2759 |
4 |
| Other owners | 226 |