- 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 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: 669
10-year publication summary
|
88
|
63
|
64
|
46
|
40
|
41
|
51
|
38
|
34
|
10
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Omya International AG | 816 |
71 |
| Stora Enso Oyj | 1504 |
43 |
| Fiberlean Technologies Limited | 116 |
33 |
| Nippon Paper Industries Co., Ltd. | 782 |
19 |
| Ecolab USA Inc. | 5190 |
18 |
| delfortgroup AG | 147 |
17 |
| Nalco Company | 620 |
17 |
| Kemira Oyj | 1167 |
14 |
| The Chemours Company Fc, LLC | 1107 |
13 |
| E. I. du Pont de Nemours and Company | 4345 |
12 |
| Omya Development AG | 100 |
11 |
| UPM-Kymmene Corporation | 868 |
11 |
| FP-Pigments Oy | 33 |
9 |
| Hewlett-Packard Development Company, L.P. | 28538 |
8 |
| Solenis Technologies, L.P. | 306 |
8 |
| Specialty Minerals (Michigan) Inc. | 209 |
8 |
| Voith Patent GmbH | 2727 |
8 |
| Wetend Technologies Oy | 28 |
7 |
| Wetend Technologies Ltd | 8 |
6 |
| Ahlstrom-munksjo Oyj | 242 |
6 |
| Other owners | 330 |