- 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 21/16 - Sizing or water-repelling agents
Patent holdings for IPC class D21H 21/16
Total number of patents in this class: 970
10-year publication summary
|
65
|
79
|
76
|
68
|
60
|
75
|
79
|
102
|
104
|
30
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1167 |
85 |
| Stora Enso Oyj | 1504 |
84 |
| BASF SE | 19740 |
30 |
| WestRock MWV, LLC | 335 |
22 |
| Daikin Industries, Ltd. | 9495 |
17 |
| International Paper Company | 857 |
17 |
| Ecolab USA Inc. | 5190 |
16 |
| Solenis Technologies, L.P. | 306 |
15 |
| Hewlett-Packard Development Company, L.P. | 28538 |
14 |
| Footprint International, LLC | 69 |
13 |
| Dow Global Technologies LLC | 10147 |
12 |
| Kuraray Co., Ltd. | 3392 |
12 |
| Nippon Paper Industries Co., Ltd. | 782 |
12 |
| Global Holdings II, Inc. | 159 |
12 |
| Chemstone, Inc. | 21 |
10 |
| GPCP IP Holdings LLC | 1733 |
10 |
| Philip Morris Products S.A. | 6751 |
9 |
| Harima Chemicals, Inc. | 202 |
9 |
| Greentech Global Pte. Ltd. | 22 |
9 |
| Archroma IP GmbH | 460 |
8 |
| Other owners | 554 |