- 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: 2362
10-year publication summary
|
155
|
209
|
196
|
175
|
213
|
195
|
208
|
165
|
162
|
132
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Donaldson Company, Inc. | 1605 |
378 |
| MANN+HUMMEL GmbH | 1768 |
366 |
| 3m Innovative Properties Company | 17771 |
97 |
| Baldwin Filters, Inc. | 243 |
57 |
| K&N Engineering, Inc. | 435 |
49 |
| Cummins Filtration IP, Inc. | 805 |
43 |
| Daikin Industries, Ltd. | 10106 |
40 |
| Parker-Hannifin Corporation | 1042 |
39 |
| Carl Freudenberg KG | 1372 |
38 |
| MAHLE International GmbH | 2794 |
35 |
| Camfil AB | 233 |
34 |
| Nitto Denko Corporation | 8338 |
32 |
| Hollingsworth & Vose Company | 296 |
26 |
| Caterpillar Inc. | 9640 |
23 |
| Parker Intangibles LLC | 1160 |
22 |
| Nippon Muki Co., Ltd. | 32 |
21 |
| Pall Corporation | 335 |
19 |
| Samsung Electronics Co., Ltd. | 147787 |
18 |
| BHA Altair, LLC | 103 |
16 |
| FilterEasy LLC, DBA FilterEasy | 33 |
15 |
| Other owners | 994 |