- 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: 150
10-year publication summary
|
17
|
12
|
17
|
16
|
20
|
12
|
12
|
10
|
7
|
9
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hollingsworth & Vose Company | 296 |
6 |
| The Boeing Company | 20052 |
4 |
| Donaldson Company, Inc. | 1595 |
4 |
| Doosan Heavy Industries & Construction Co., Ltd. | 580 |
4 |
| 3m Innovative Properties Company | 17717 |
3 |
| Eastman Chemical Company | 2114 |
3 |
| Excel Corporate Holdings Limited | 5 |
3 |
| International Business Machines Corporation | 61759 |
2 |
| EMD Millipore Corporation | 640 |
2 |
| Board of Regents, The University of Texas System | 5963 |
2 |
| Toray Industries, Inc. | 7021 |
2 |
| Conwed Plastics Acquisition Company V LLC | 3 |
2 |
| HYDAC Filter Systems GmbH | 35 |
2 |
| Indufil B.V. | 13 |
2 |
| Ishigaki Company Limited | 47 |
2 |
| MANN+HUMMEL GmbH | 1778 |
2 |
| The University of Akron | 642 |
2 |
| Patel, Dipen M | 5 |
2 |
| Patel, Rupal D | 5 |
2 |
| Biosorbe AB | 8 |
2 |
| Other owners | 97 |