- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 46/54 - Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
Patent holdings for IPC class B01D 46/54
Total number of patents in this class: 351
10-year publication summary
|
22
|
20
|
33
|
35
|
52
|
31
|
41
|
23
|
23
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Nitto Denko Corporation | 8468 |
19 |
| Donaldson Company, Inc. | 1591 |
12 |
| Hollingsworth & Vose Company | 299 |
12 |
| W. L. Gore & Associates, Inc. | 2702 |
10 |
| Daikin Industries, Ltd. | 10401 |
7 |
| Carl Freudenberg KG | 1433 |
6 |
| 3m Innovative Properties Company | 17507 |
5 |
| InnovaPrep LLC | 65 |
5 |
| Weifang Goertek Microelectronics Co., Ltd. | 158 |
5 |
| E. I. du Pont de Nemours and Company | 3661 |
4 |
| Entegris, Inc. | 1985 |
4 |
| MAHLE International GmbH | 2884 |
4 |
| Nanjing Tech University | 291 |
4 |
| China University of Petroleum (Beijing) | 299 |
3 |
| Gudeng Precision Industrial Co., Ltd. | 165 |
3 |
| MANN+HUMMEL GmbH | 1800 |
3 |
| Numatic International Limited, | 172 |
3 |
| Ufi Innovation Center S.r.l. | 72 |
3 |
| Nxtnano, LLC | 5 |
3 |
| At&m Environmental Engineering Technology Co., Ltd. | 10 |
3 |
| Other owners | 233 |