- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 33/09 - Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration with surface cells independently connected to pressure distributors
Patent holdings for IPC class B01D 33/09
Total number of patents in this class: 28
10-year publication summary
|
2
|
2
|
2
|
5
|
3
|
3
|
1
|
0
|
0
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| BHS-Sonthofen GmbH | 40 |
7 |
| ANDRITZ KMPT GmbH | 7 |
4 |
| BP Corporation North America Inc. | 748 |
3 |
| INEOS US Chemicals Company | 32 |
3 |
| Andritz Inc. | 334 |
2 |
| Andritz Oy | 287 |
2 |
| Metso Paper, Inc. | 402 |
2 |
| Valmet AB | 523 |
2 |
| Lurgi GmbH | 97 |
1 |
| Outotec (Filters) Oy | 4 |
1 |
| Voith Patent GmbH | 2762 |
1 |
| Other owners | 0 |