B01D 2325/023
Dense layer within the membrane
B01D2325/023 (Dense layer within the membrane) appears on 106 US grants and 131 published applications in this corpus.
Search patents in B01D- Granted patents
- 106
- Published applications
- 131
- Assignees
- 84
- Inventors
- 360
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 4 |
| 2006 | 0 | 2 |
| 2007 | 1 | 5 |
| 2008 | 2 | 3 |
| 2009 | 4 | 7 |
| 2010 | 4 | 7 |
| 2011 | 2 | 3 |
| 2012 | 4 | 3 |
| 2013 | 1 | 3 |
| 2014 | 6 | 3 |
| 2015 | 1 | 7 |
| 2016 | 5 | 2 |
| 2017 | 9 | 12 |
| 2018 | 2 | 7 |
| 2019 | 9 | 7 |
| 2020 | 9 | 10 |
| 2021 | 9 | 16 |
| 2022 | 4 | 8 |
| 2023 | 3 | 3 |
| 2024 | 11 | 3 |
| 2025 | 6 | 7 |
| 2026 | 2 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for preparing a novel guanidine-based composite nanofiltration flat-sheet membrane21 Jul 2026US 12,685,969 B2Tongji University
- Virus removal membrane and method for manufacturing virus removal membrane5 May 2026US 12,616,940 B2Asahi Kasei Life Science Corporation
- Porous separation membrane21 Oct 2025US 12,447,445 B2Toray Industries, Inc.
- Cross-linked polymeric membrane1 Jul 2025US 12,343,685 B2National University of Singapore
- Hydrophilic porous membrane and method for producing hydrophilic porous membrane1 Apr 2025US 12,263,451 B2FUJIFILM Corporation
- Porous hollow fiber membrane and blood purification module24 Sep 2026US 2026/0284607 A1Toray Industries, Inc.
- Separation membrane, method for manufacturing same, membrane module for at least one of deaeration and aeration, and device for at least one of deaeration and aeration17 Sep 2026US 2026/0273477 A1Toray Industries, Inc.
- Porous membrane and desalination method2 Jul 2026US 2026/0183719 A1Toray Industries, Inc.
- Systems and methods for tangential flow depth filtration21 May 2026US 2026/0138096 A1Repligen Corporation
- Hollow fiber membrane, hollow fiber membrane unit, hollow fiber membrane module, and humidity control machine30 Apr 2026US 2026/0115669 A1Toray Industries, Inc.
Most cited
By later US patents
- Process to form mesostructured films157US 5,858,457 ASandia Corporation · 1999
- Back-flushable spiral wound filter and methods of making and using same81US 6,755,970 B1TriSep Corporation · 2004
- Inorganic anisotropic hollow fibers73US 4,175,153 AMonsanto Company · 1979
- Ion transport membranes with catalyzed mixed conducting porous layer73US 5,534,471 AAir Products and Chemicals, Inc. · 1996
- Laminated microporous fluorocarbon membrane and fluorocarbon filter cartridge using same51US 5,154,827 AParker-Nannifin Corporation · 1992