B01D 2323/2187
Polyvinylpyrolidone
B01D2323/2187 (Polyvinylpyrolidone) appears on 30 US grants and 70 published applications in this corpus.
Search patents in B01D- Granted patents
- 30
- Published applications
- 70
- Assignees
- 43
- Inventors
- 210
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 2 |
| 2015 | 0 | 1 |
| 2016 | 0 | 4 |
| 2017 | 2 | 5 |
| 2018 | 5 | 3 |
| 2019 | 2 | 6 |
| 2020 | 3 | 3 |
| 2021 | 0 | 11 |
| 2022 | 4 | 4 |
| 2023 | 1 | 6 |
| 2024 | 6 | 9 |
| 2025 | 5 | 7 |
| 2026 | 1 | 8 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- High flux nanofiltration membrane2 Jun 2026US 12,643,075 B1King Fahd University of Petroleum and Minerals
- Porous separation membrane21 Oct 2025US 12,447,445 B2Toray Industries, Inc.
- Alkali-stable nanofiltration composite membrane and method of manufacture thereof30 Sep 2025US 12,427,486 B2Bl Technologies, Inc.
- Combination of pyrrolidone based solvents for the production of porous membranes18 Feb 2025US 12,226,738 B2Sartorius Stedim Biotech GmbH
- Method for manufacturing porous membrane and porous membrane18 Feb 2025US 12,226,742 B2FUJIFILM Corporation
- Hollow fiber membrane, method for manufacturing hollow fiber membrane, and hollow fiber membrane module6 Aug 2026US 2026/0225043 A1Toray Industries, Inc.
- Semipermeable membrane and semipermeable membrane module30 Jul 2026US 2026/0216670 A1Toyobo Co., Ltd.
- Methods of making lithium selective nanofiltration membranes and their applications2 Jul 2026US 2026/0183723 A1Greenvi Corp.
- Hollow fiber membrane, hollow fiber membrane unit, hollow fiber membrane module, and humidity control machine30 Apr 2026US 2026/0115669 A1Toray Industries, Inc.
- Graft polyarylether copolymers26 Mar 2026US 2026/0085142 A1Solvay Specialty Polymers USA, LLC
Most cited
By later US patents
- Separation membrane, method of producing the same and separation membrane module using the separation membrane5US 8,613,361 B2Toray Industries, Inc. · 2013
- Porous membrane, blood purifying module incorporating porous membrane, and method for producing porous membrane4US 9,993,777 B2Toray Industries, Inc. · 2018
- Hollow-fiber membrane blood purification device1US 10,029,216 B2Asahi Kasei Medical Co., Ltd. · 2018
- Carbon membrane for fluid separation, fluid separation membrane module, and method for producing carbon membrane for fluid separation1US 10,159,943 B2Toray Industries, Inc. · 2018
- High toughness hollow fiber membranes based on vinylidene fluoride polymers1US 10,322,381 B2Arkema Inc. · 2019