- 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 17/28 - Starch
Patent holdings for IPC class D21H 17/28
Total number of patents in this class: 548
10-year publication summary
|
35
|
32
|
37
|
39
|
27
|
31
|
38
|
34
|
30
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1232 |
61 |
| Stora Enso Oyj | 1633 |
28 |
| Ecolab USA Inc. | 5722 |
16 |
| First Quality Tissue, LLC | 159 |
14 |
| Solenis Technologies, L.P. | 320 |
14 |
| Seiko Epson Corporation | 19988 |
12 |
| Philip Morris USA Inc. | 670 |
11 |
| Roquette Freres | 1039 |
11 |
| Essity Operations France | 39 |
10 |
| Billerud AB | 146 |
9 |
| Fiberlean Technologies Limited | 104 |
9 |
| BASF SE | 21129 |
8 |
| Domtar Paper Company, LLC | 122 |
8 |
| Mondi AG | 202 |
8 |
| Omya International AG | 771 |
8 |
| Footprint International, LLC | 85 |
8 |
| delfortgroup AG | 154 |
7 |
| University of Maine System Board of Trustees | 280 |
7 |
| The Procter & Gamble Company | 21900 |
6 |
| Billerudkorsnas AB | 88 |
6 |
| Other owners | 287 |