- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 21/34 - Controlling the feed distributionControlling the liquid level
Patent holdings for IPC class B01D 21/34
Total number of patents in this class: 227
10-year publication summary
|
26
|
31
|
27
|
18
|
29
|
18
|
19
|
21
|
10
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| DSM IP Assets B.V. | 5801 |
5 |
| Terumo BCT, Inc. | 434 |
5 |
| Vulco, S.A. | 56 |
5 |
| RIT Venture Fund I, LLC | 9 |
5 |
| Snyder, Steve | 9 |
5 |
| Terry, David | 10 |
5 |
| Westbrook, Greg | 9 |
5 |
| Evoqua Water Technologies LLC | 903 |
4 |
| ITT Bornemann GmbH | 25 |
4 |
| Nanoshell Company, LLC | 15 |
4 |
| Saudi Arabian Oil Company | 12481 |
4 |
| Batfer Investment S.A. | 40 |
4 |
| United Conveyor LLC | 31 |
4 |
| Halliburton Energy Services, Inc. | 20449 |
3 |
| Expro North Sea Limited | 227 |
3 |
| Fenwal, Inc. | 648 |
3 |
| Invent Umwelt-und Verfahrenstechnik AG | 132 |
3 |
| Liberty Evans, LLC | 11 |
3 |
| Micro Motion, Inc. | 1020 |
3 |
| National Oilwell Varco, L.P. | 1626 |
3 |
| Other owners | 147 |