- All sections
- B - Performing operations; transporting
- B01D - Separation
- B01D 71/38 - Polyalkenylalcohols; Polyalkenylesters; Polyalkenylethers; Polyalkenylaldehydes; Polyalkenylketones; Polyalkenylacetals; Polyalkenylketals
Patent holdings for IPC class B01D 71/38
Total number of patents in this class: 331
10-year publication summary
|
35
|
28
|
35
|
23
|
34
|
31
|
26
|
18
|
20
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Toray Industries, Inc. | 6652 |
24 |
| FUJIFILM Corporation | 27102 |
15 |
| Renaissance Energy Research Corporation | 60 |
14 |
| Nitto Denko Corporation | 7879 |
13 |
| Kuraray Co., Ltd. | 3392 |
10 |
| Sumitomo Chemical Company, Limited | 8808 |
8 |
| Gambro Lundia AB | 1383 |
8 |
| Toyobo Co., Ltd. | 2286 |
8 |
| Uop LLC | 4083 |
7 |
| Memphasys Ltd | 11 |
6 |
| Asahi Kasei Kabushiki Kaisha | 2429 |
5 |
| Asahi Kasei Medical Co., Ltd. | 308 |
5 |
| Yamaguchi University | 299 |
5 |
| Sumitomo Electric Industries, Ltd. | 14131 |
4 |
| The Research Foundation for The State University of New York | 1468 |
4 |
| SINTEF Tto AS | 126 |
4 |
| Teijin Limited | 1216 |
4 |
| 3m Innovative Properties Company | 18406 |
3 |
| LG Chem, Ltd. | 17205 |
3 |
| The Regents of the University of California | 18943 |
3 |
| Other owners | 178 |