B01D 2323/21826
Acids
Official title: Acids, e.g. acetic acid
B01D2323/21826 (Acids) appears on 22 US grants and 38 published applications in this corpus.
Search patents in B01D- Granted patents
- 22
- Published applications
- 38
- Assignees
- 28
- Inventors
- 98
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2016 | 0 | 3 |
| 2017 | 1 | 2 |
| 2018 | 2 | 3 |
| 2019 | 1 | 4 |
| 2020 | 3 | 4 |
| 2021 | 3 | 2 |
| 2022 | 5 | 1 |
| 2023 | 0 | 4 |
| 2024 | 1 | 5 |
| 2025 | 6 | 5 |
| 2026 | 0 | 5 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- System for separating oil and water mixture using hydrophilic modified polystyrene and hydrophobic polyurethane2 Dec 2025US 12,485,365 B2King Fahd University of Petroleum and Minerals
- Synthesis of graphene-modified polyurethane foam membrane for separating water from an oil-water mixture4 Nov 2025US 12,458,929 B2King Fahd University of Petroleum and Minerals
- Hollow fibres28 Oct 2025US 12,454,773 B2IP Ventures GmbH
- Filtration apparatus containing graphene oxide membrane26 Aug 2025US 12,397,268 B2Via Separations, Inc.
- Durable graphene oxide membranes15 Jul 2025US 12,357,950 B2Via Separations, Inc.
- Hollow fiber membrane and hollow fiber membrane module6 Aug 2026US 2026/0225044 A1Toray Industries, Inc.
- Methods of making lithium selective nanofiltration membranes and their applications2 Jul 2026US 2026/0183723 A1Greenvi Corp.
- Filtration apparatus containing graphene oxide membrane25 Jun 2026US 2026/0175179 A1Via Separations, Inc.
- Durable graphene oxide membranes7 May 2026US 2026/0124586 A1Via Separations, Inc.
- Filtration membranes and method of manufacture thereof1 Jan 2026US 2026/0001043 A1
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
- Complex nanofiltration membrane and the preparation thereof1US 10,040,032 B2Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation · 2018
- Thin film composite forward osmosis membranes with performance enhancing layers1US 10,654,002 B2International Business Machines Corporation · 2020