- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 39/04 - Organic material, e.g. cellulose, cotton
Patent holdings for IPC class B01D 39/04
Total number of patents in this class: 147
10-year publication summary
|
18
|
12
|
20
|
17
|
20
|
13
|
12
|
11
|
7
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hollingsworth & Vose Company | 290 |
5 |
| The Boeing Company | 20013 |
4 |
| Donaldson Company, Inc. | 1598 |
4 |
| Doosan Heavy Industries & Construction Co., Ltd. | 581 |
4 |
| 3m Innovative Properties Company | 17849 |
3 |
| Eastman Chemical Company | 2254 |
3 |
| Excel Corporate Holdings Limited | 5 |
3 |
| International Business Machines Corporation | 61023 |
2 |
| EMD Millipore Corporation | 647 |
2 |
| Board of Regents, The University of Texas System | 5751 |
2 |
| Toray Industries, Inc. | 6891 |
2 |
| Conwed Plastics Acquisition Company V LLC | 3 |
2 |
| HYDAC Filter Systems GmbH | 34 |
2 |
| Indufil B.V. | 14 |
2 |
| Ishigaki Company Limited | 47 |
2 |
| MANN+HUMMEL GmbH | 1751 |
2 |
| The University of Akron | 652 |
2 |
| Patel, Dipen M | 5 |
2 |
| Patel, Rupal D | 5 |
2 |
| Biosorbe AB | 8 |
2 |
| Other owners | 95 |