- All sections
- B - Performing operations; transporting
- B01D - Separation
- B01D 33/21 - Filters with filtering elements which move during the filtering operation with rotary plane filtering surfaces with hollow filtering discs transversely mounted on a hollow rotary shaft
Patent holdings for IPC class B01D 33/21
Total number of patents in this class: 193
10-year publication summary
|
13
|
17
|
16
|
11
|
10
|
5
|
7
|
5
|
10
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Veolia Water Solutions & Technologies Support | 542 |
25 |
| Voith Patent GmbH | 2731 |
11 |
| Outotec (Finland) Oy | 489 |
10 |
| Evoqua Water Technologies LLC | 905 |
8 |
| Gaudfrin | 21 |
8 |
| Kadant Black Clawson LLC | 35 |
7 |
| Andritz Oy | 280 |
6 |
| Valmet AB | 494 |
5 |
| Sulzer Management AG | 664 |
3 |
| Toyo Boseki Kabushiki Kaisha | 424 |
3 |
| Valmet Technologies Oy | 290 |
3 |
| Ziemann Holvrieka GmbH | 28 |
3 |
| Grundfos Management a/s | 187 |
3 |
| KMPT AG | 4 |
3 |
| France Membranes Technologies - FMT | 3 |
3 |
| Combipro AS | 4 |
3 |
| O.m.it S.r.l. | 3 |
3 |
| Toray Industries, Inc. | 6843 |
2 |
| A. Kayser Automotive Systems GmbH | 29 |
2 |
| BL Technologies, Inc. | 844 |
2 |
| Other owners | 80 |