- All sections
- B - Performing operationstransporting
- B01D - Separation
- B01D 61/58 - Multistep processes
Patent holdings for IPC class B01D 61/58
Total number of patents in this class: 1251
10-year publication summary
|
75
|
98
|
109
|
129
|
131
|
106
|
103
|
107
|
114
|
49
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Toray Industries, Inc. | 6891 |
74 |
| Kurita Water Industries Ltd. | 1185 |
69 |
| Organo Corporation | 456 |
55 |
| Mitsubishi Heavy Industries, Ltd. | 8647 |
27 |
| FUJIFILM Corporation | 29228 |
24 |
| Hitachi, Ltd. | 15434 |
20 |
| Toyobo Co., Ltd. | 2482 |
18 |
| BL Technologies, Inc. | 831 |
17 |
| Asahi Kasei Kabushiki Kaisha | 2636 |
16 |
| Nomura Micro Science Co., Ltd. | 75 |
16 |
| Nitto Denko Corporation | 8182 |
14 |
| Evoqua Water Technologies LLC | 914 |
12 |
| Kabushiki Kaisha Toshiba, doing business as Toshiba Corporation | 6274 |
12 |
| Porifera, Inc. | 68 |
10 |
| General Electric Company | 13829 |
9 |
| DSM IP Assets B.V. | 5659 |
9 |
| Glycom A/S | 251 |
9 |
| BP Exploration Operating Company Limited | 265 |
8 |
| E. & J. Gallo Winery | 1986 |
8 |
| Gradiant Corporation | 130 |
8 |
| Other owners | 816 |