- 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 21/12 - Defoamers
Patent holdings for IPC class D21H 21/12
Total number of patents in this class: 76
10-year publication summary
|
1
|
3
|
1
|
4
|
5
|
6
|
4
|
7
|
4
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Wacker Chemie AG | 2103 |
10 |
| Kemira Oyj | 1244 |
8 |
| Ecolab USA Inc. | 5753 |
5 |
| BASF SE | 21165 |
4 |
| Nanjing Sixin Scientific-technological Application Research Institute Co. Ltd. | 9 |
4 |
| Solenis Technologies, L.P. | 305 |
4 |
| Jiangsu Sixin Scientific-Technological Application Research Institute Co., Ltd. | 43 |
4 |
| State Line Holdings, LLC | 4 |
3 |
| Dow Global Technologies LLC | 10845 |
2 |
| Klabin SA | 21 |
2 |
| Dow Silicones Corporation | 2076 |
2 |
| Seal Chemistry (Pty) Ltd | 4 |
2 |
| Dr. W. Kolb AG | 4 |
2 |
| Corning Incorporated | 10463 |
1 |
| Nissin Chemical Industry Co., Ltd. | 111 |
1 |
| Dow Corning Corporation | 901 |
1 |
| Buckman Laboratories International, Inc. | 240 |
1 |
| BYK-Chemie GmbH | 449 |
1 |
| Cytec Surface Specialties S.A. | 35 |
1 |
| JT International S.A. | 2834 |
1 |
| Other owners | 17 |