- 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 17/67 - Water-insoluble compounds, e.g. fillers or pigments
Patent holdings for IPC class D21H 17/67
Total number of patents in this class: 671
10-year publication summary
|
64
|
46
|
40
|
41
|
51
|
38
|
38
|
27
|
23
|
5
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Omya International AG | 775 |
70 |
| Stora Enso Oyj | 1633 |
41 |
| Fiberlean Technologies Limited | 104 |
30 |
| Ecolab USA Inc. | 5745 |
20 |
| Nippon Paper Industries Co., Ltd. | 841 |
18 |
| delfortgroup AG | 155 |
17 |
| Nalco Company | 549 |
17 |
| The Chemours Company Fc, LLC | 1309 |
13 |
| Specialty Minerals (Michigan) Inc. | 232 |
13 |
| E. I. du Pont de Nemours and Company | 3652 |
12 |
| Kemira Oyj | 1241 |
12 |
| UPM-Kymmene Corporation | 980 |
11 |
| Omya Development AG | 85 |
10 |
| FP-Pigments Oy | 31 |
9 |
| Hewlett-Packard Development Company, L.P. | 25337 |
8 |
| Solenis Technologies, L.P. | 305 |
8 |
| Oji Holdings Corporation | 781 |
7 |
| Wetend Technologies Oy | 26 |
7 |
| Voith Patent GmbH | 2771 |
6 |
| Wetend Technologies Ltd | 8 |
6 |
| Other owners | 336 |