- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 71/18 - Mixed esters, e.g. cellulose acetate-butyrate
Patent holdings for IPC class B01D 71/18
Total number of patents in this class: 29
10-year publication summary
|
2
|
3
|
5
|
3
|
6
|
4
|
3
|
2
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Toray Industries, Inc. | 6951 |
9 |
| Daicel Corporation | 2351 |
5 |
| Saudi Arabian Oil Company | 13206 |
3 |
| Sartorius Stedim Biotech GmbH | 831 |
2 |
| Uop LLC | 4238 |
1 |
| Kaneka Corporation | 4529 |
1 |
| Aramco Services Company | 3981 |
1 |
| Kurita Water Industries Ltd. | 1194 |
1 |
| Kyushu University, National University Corporation | 1657 |
1 |
| Nanopareil, LLC | 14 |
1 |
| Sumitomo Dainippon Pharma Co., Ltd. | 216 |
1 |
| Toyobo Co., Ltd. | 2499 |
1 |
| Hangzhou Cobetter Filtration Equipment Co., Ltd | 31 |
1 |
| Sumitomo Pharma Co., Ltd. | 612 |
1 |
| Other owners | 0 |