- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 33/03 - Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons with vibrating filter elements
Patent holdings for IPC class B01D 33/03
Total number of patents in this class: 171
10-year publication summary
|
18
|
26
|
18
|
16
|
19
|
15
|
17
|
9
|
7
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| M-I L.L.C. | 815 |
20 |
| National Oilwell Varco, L.P. | 1648 |
20 |
| Derrick Corporation | 245 |
13 |
| Vermeer Manufacturing Company | 634 |
10 |
| United Wire Limited | 45 |
7 |
| Halliburton Energy Services, Inc. | 20769 |
6 |
| The Charles Machine Works, Inc. | 409 |
6 |
| Schlumberger Technology Corporation | 10641 |
4 |
| Saudi Arabian Oil Company | 12891 |
4 |
| Schlumberger Canada Limited | 7244 |
3 |
| CDE Global Limited | 77 |
3 |
| Schlumberger Technology B.v. | 5154 |
2 |
| Aramco Services Company | 3921 |
2 |
| Axiom Process Ltd. | 14 |
2 |
| Buffalo Wire Works Company, Inc. | 7 |
2 |
| Cubility AS | 39 |
2 |
| Del Corporation | 11 |
2 |
| Recover Energy Services Inc. | 51 |
2 |
| Röhren- und Pumpenwerk Bauer Ges.m.b.H. | 35 |
2 |
| UTS Biogastechnik GmbH | 28 |
2 |
| Other owners | 57 |