- All sections
- B - Performing operations; transporting
- B01D - Separation
- B01D 39/18 - Other self-supporting filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
Patent holdings for IPC class B01D 39/18
Total number of patents in this class: 415
10-year publication summary
|
21
|
42
|
40
|
46
|
46
|
44
|
61
|
49
|
49
|
15
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Donaldson Company, Inc. | 1513 |
48 |
| Hollingsworth & Vose Company | 274 |
31 |
| Ahlstrom-munksjo Oyj | 242 |
23 |
| MANN+HUMMEL GmbH | 1682 |
16 |
| Ahlstrom Oyj | 64 |
16 |
| Neenah Gessner GmbH | 50 |
14 |
| Ahlstrom Corporation | 77 |
11 |
| MAHLE International GmbH | 2670 |
10 |
| EMD Millipore Corporation | 657 |
8 |
| FUJIFILM Corporation | 27102 |
7 |
| Cummins Filtration IP, Inc. | 812 |
6 |
| Eurofilters N.V. | 53 |
5 |
| KX Technologies LLC | 158 |
5 |
| Lenzing Aktiengesellschaft | 529 |
5 |
| Xyleco, Inc. | 217 |
5 |
| Eastman Chemical Company | 2239 |
4 |
| Knowlton Technologies, LLC | 7 |
4 |
| Kolon Industries, Inc. | 1506 |
4 |
| KT & G Corporation | 1876 |
4 |
| Hokuetsu Corporation | 60 |
4 |
| Other owners | 185 |