- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 71/38 - PolyalkenylalcoholsPolyalkenylestersPolyalkenylethersPolyalkenylaldehydesPolyalkenylketonesPolyalkenylacetalsPolyalkenylketals
Patent holdings for IPC class B01D 71/38
Total number of patents in this class: 377
10-year publication summary
|
35
|
23
|
34
|
31
|
29
|
23
|
21
|
14
|
19
|
13
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Toray Industries, Inc. | 7143 |
30 |
| FUJIFILM Corporation | 30628 |
17 |
| Nitto Denko Corporation | 8565 |
14 |
| Renaissance Energy Research Corporation | 62 |
14 |
| Toyobo Co., Ltd. | 2537 |
11 |
| Gambro Lundia AB | 1398 |
10 |
| Kuraray Co., Ltd. | 3601 |
9 |
| Sumitomo Electric Industries, Ltd. | 16331 |
8 |
| Sumitomo Chemical Company, Limited | 8969 |
7 |
| Uop LLC | 4397 |
7 |
| Ohio State Innovation Foundation | 2389 |
6 |
| Memphasys Ltd | 11 |
6 |
| Asahi Kasei Kabushiki Kaisha | 2847 |
5 |
| Asahi Kasei Medical Co., Ltd. | 231 |
5 |
| National University Corporation Kobe University | 578 |
5 |
| Yamaguchi University | 329 |
5 |
| The Regents of the University of California | 20842 |
4 |
| Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation | 293 |
4 |
| China Petroleum & Chemical Corporation | 2169 |
4 |
| National University Corporation Kyoto Institute of Technology | 211 |
4 |
| Other owners | 202 |