- 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 17/63 - Inorganic compounds
Patent holdings for IPC class D21H 17/63
Total number of patents in this class: 228
10-year publication summary
|
12
|
14
|
11
|
13
|
13
|
12
|
4
|
10
|
8
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nalco Company | 573 |
15 |
| Ecolab USA Inc. | 5507 |
11 |
| International Paper Company | 785 |
11 |
| Kemira Oyj | 1208 |
10 |
| Fiberlean Technologies Limited | 114 |
8 |
| Omya International AG | 771 |
8 |
| Hewlett-Packard Development Company, L.P. | 25841 |
5 |
| Oji Holdings Corporation | 725 |
4 |
| Specialty Minerals (Michigan) Inc. | 225 |
4 |
| Stora Enso Oyj | 1650 |
4 |
| Wetend Technologies Oy | 27 |
4 |
| Société des Produits Nestlé S.A. | 9301 |
3 |
| E. I. du Pont de Nemours and Company | 4026 |
3 |
| Kimberly-clark Worldwide, Inc. | 5449 |
3 |
| Centre National de La Recherche Scientifique | 10476 |
3 |
| Archroma IP GmbH | 461 |
3 |
| Ecole Superieure de Physique et de Chimie Industrielles de La Ville de Paris | 355 |
3 |
| Tokushu Tokai Paper Co., Ltd. | 37 |
3 |
| DuPont Safety & Construction, Inc. | 704 |
3 |
| Imam Mohammad Ibn Saud Islamic University | 125 |
3 |
| Other owners | 117 |