B01D 2323/21834
Amines
B01D2323/21834 (Amines) appears on 31 US grants and 55 published applications in this corpus.
Search patents in B01D- Granted patents
- 31
- Published applications
- 55
- Assignees
- 32
- Inventors
- 132
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 3 | 5 |
| 2021 | 3 | 6 |
| 2022 | 2 | 3 |
| 2023 | 6 | 5 |
| 2024 | 4 | 6 |
| 2025 | 6 | 13 |
| 2026 | 3 | 10 |
By publication year. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High flux nanofiltration membrane2 Jun 2026US 12,643,075 B1King Fahd University of Petroleum and Minerals
- Crosslinked facilitated transport membrane for hydrogen purification from coal-derived syngas31 Mar 2026US 12,589,363 B2Ohio State Innovation Foundation
- Grafted polyamide membrane for nanofiltration applications6 Jan 2026US 12,515,178 B1King Fahd University of Petroleum and Minerals
- Filtration membrane4 Nov 2025US 12,458,932 B2King Fahd University of Petroleum and Minerals
- Hollow fibres28 Oct 2025US 12,454,773 B2IP Ventures GmbH
- Conductive hollow fiber membrane and preparation method thereof and membrane assembly24 Sep 2026US 2026/0284601 A1Cangzhou Institute of Tiangong University
- Hollow fiber membrane and hollow fiber membrane module6 Aug 2026US 2026/0225044 A1Toray Industries, Inc.
- Filtration apparatus containing graphene oxide membrane25 Jun 2026US 2026/0175179 A1Via Separations, Inc.
- Filtration apparatus comprising polymer modified graphene oxide membranes18 Jun 2026US 2026/0166496 A1
- Anion exchange membrane and method of preparing the same11 Jun 2026US 2026/0159656 A1Toray Advanced Materials Korea Inc.
Most cited
By later US patents
- Durable graphene oxide membranes5US 11,097,227 B2Via Separations, Inc. · 2021
- Filtration apparatus containing graphene oxide membrane5US 11,123,694 B2Via Separations, Inc. · 2021
- Durable graphene oxide membranes3US 11,498,034 B2Via Separations, Inc. · 2022
- CO2-philic crosslinked polyethylene glycol-based membranes for acid and sour gas separations2US 11,718,805 B2Saudi Arabian Oil Company · 2023
- Block copolymers, their manufacture and their use2US 9,061,254 B2KRATON Polymers U. S. LLC · 2015