- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 41/04 - Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids of rigid self-supporting filtering material
Patent holdings for IPC class B01D 41/04
Total number of patents in this class: 146
10-year publication summary
|
13
|
10
|
15
|
10
|
9
|
19
|
8
|
14
|
14
|
2
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| K&N Engineering, Inc. | 443 |
12 |
| Cyclone Filter Tools LLC | 11 |
8 |
| Gita Green, Inc. | 10 |
5 |
| Green Products & Technologies, L.L.C. | 38 |
5 |
| Ecolab USA Inc. | 5702 |
4 |
| LG Chem, Ltd. | 17786 |
3 |
| Hubb Filters, Inc. | 10 |
3 |
| Nagase Filter Co., Ltd. | 5 |
3 |
| National University Corporation Kumamoto University | 404 |
3 |
| Stockforsa Invest AB | 4 |
3 |
| Illinois Tool Works Inc. | 11712 |
2 |
| Corning Incorporated | 10413 |
2 |
| 1934612 Ontario Inc. | 22 |
2 |
| CTS Corporation | 265 |
2 |
| Johnson Screens, Inc. | 41 |
2 |
| Pall Corporation | 343 |
2 |
| Phillips 66 Company | 1051 |
2 |
| Saudi Arabian Oil Company | 13931 |
2 |
| Spraying Systems Co. | 503 |
2 |
| Vetter Pharma-fertigung GmbH & Co. KG | 155 |
2 |
| Other owners | 77 |