- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 3/28 - Fractionating columns with surface contact and vertical guides, e.g. film action
Patent holdings for IPC class B01D 3/28
Total number of patents in this class: 54
10-year publication summary
|
4
|
4
|
10
|
2
|
2
|
3
|
2
|
2
|
4
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Uop LLC | 4393 |
8 |
| Linde Aktiengesellschaft | 1421 |
4 |
| Borealis AG | 2736 |
2 |
| Geosepaa LLC | 3 |
2 |
| Romico Hold A.V.V. | 7 |
2 |
| Sunpine AB | 34 |
2 |
| Hirschberg Engineering AG | 8 |
2 |
| Mitsubishi Heavy Industries, Ltd. | 9139 |
1 |
| Chevron U.S.A. Inc. | 4136 |
1 |
| National Institute of Advanced Industrial Science and Technology | 3794 |
1 |
| Aquaback Technologies, Inc. | 8 |
1 |
| Artisan Industries, Inc. | 21 |
1 |
| Cargill, Incorporated | 2956 |
1 |
| Columbia Energy & Environmental Services, Inc. | 3 |
1 |
| Curtin University of Technology | 68 |
1 |
| DEKA Products Limited Partnership | 1887 |
1 |
| Doosan Babcock Limited | 30 |
1 |
| Engineers India Limited | 4 |
1 |
| Futerro S.A. | 57 |
1 |
| IFP Energies Nouvelles | 3095 |
1 |
| Other owners | 19 |