- 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 21/10 - Retention agents or drainage improvers
Patent holdings for IPC class D21H 21/10
Total number of patents in this class: 447
10-year publication summary
|
24
|
35
|
28
|
21
|
21
|
9
|
22
|
15
|
26
|
17
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kemira Oyj | 1222 |
86 |
| Solenis Technologies, L.P. | 334 |
41 |
| Ecolab USA Inc. | 5598 |
31 |
| Stora Enso Oyj | 1665 |
23 |
| S.p.c.m. SA | 239 |
21 |
| SNF Group | 375 |
19 |
| BASF SE | 21087 |
16 |
| Nalco Company | 566 |
12 |
| UPM-Kymmene Corporation | 956 |
8 |
| Solenis Technologies Cayman, L.P. | 31 |
8 |
| Fiberlean Technologies Limited | 111 |
7 |
| AGC Chemicals Americas, Inc. | 42 |
6 |
| Buckman Laboratories International, Inc. | 242 |
6 |
| Soane Materials LLC | 22 |
6 |
| Enzymatic Deinking Technologies, LLC | 42 |
5 |
| Nouryon Chemicals International B.V. | 614 |
5 |
| Kemira Chemicals, Inc. | 80 |
4 |
| Kurita Water Industries Ltd. | 1230 |
4 |
| Meiji Seika Pharma Co., Ltd. | 254 |
4 |
| Tetra Laval Holdings & Finance S.A. | 2184 |
4 |
| Other owners | 131 |