- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 46/52 - Particle separators, e.g. dust precipitators, using filters embodying folded material
Patent holdings for IPC class B01D 46/52
Total number of patents in this class: 2314
10-year publication summary
|
165
|
228
|
210
|
185
|
229
|
210
|
216
|
177
|
163
|
87
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Donaldson Company, Inc. | 1598 |
379 |
| MANN+HUMMEL GmbH | 1751 |
358 |
| 3m Innovative Properties Company | 17849 |
95 |
| Baldwin Filters, Inc. | 237 |
49 |
| K&N Engineering, Inc. | 423 |
48 |
| Cummins Filtration IP, Inc. | 808 |
43 |
| Daikin Industries, Ltd. | 9957 |
39 |
| Parker-Hannifin Corporation | 1032 |
38 |
| Carl Freudenberg KG | 1367 |
37 |
| Camfil AB | 226 |
34 |
| MAHLE International GmbH | 2743 |
33 |
| Nitto Denko Corporation | 8182 |
32 |
| Hollingsworth & Vose Company | 290 |
24 |
| Caterpillar Inc. | 9472 |
23 |
| Parker Intangibles LLC | 1174 |
22 |
| Nippon Muki Co., Ltd. | 29 |
19 |
| Pall Corporation | 335 |
18 |
| Samsung Electronics Co., Ltd. | 144143 |
17 |
| BHA Altair, LLC | 103 |
16 |
| FilterEasy LLC, DBA FilterEasy | 33 |
15 |
| Other owners | 975 |