B01D 2325/02
Details relating to pores or porosity of the membranes
B01D2325/02 (Details relating to pores or porosity of the membranes) appears on 1,587 US grants and 2,311 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,587
- Published applications
- 2,311
- Assignees
- 1,074
- Inventors
- 5,337
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 9 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 19 | 0 |
| 1990 | 18 | 0 |
| 1991 | 16 | 0 |
| 1992 | 11 | 0 |
| 1993 | 18 | 0 |
| 1994 | 9 | 0 |
| 1995 | 9 | 0 |
| 1996 | 6 | 0 |
| 1997 | 17 | 0 |
| 1998 | 21 | 0 |
| 1999 | 28 | 0 |
| 2000 | 18 | 0 |
| 2001 | 18 | 5 |
| 2002 | 13 | 15 |
| 2003 | 15 | 31 |
| 2004 | 18 | 36 |
| 2005 | 21 | 40 |
| 2006 | 18 | 41 |
| 2007 | 28 | 52 |
| 2008 | 25 | 58 |
| 2009 | 26 | 70 |
| 2010 | 37 | 67 |
| 2011 | 27 | 61 |
| 2012 | 44 | 61 |
| 2013 | 43 | 67 |
| 2014 | 46 | 60 |
| 2015 | 44 | 93 |
| 2016 | 54 | 96 |
| 2017 | 70 | 128 |
| 2018 | 57 | 80 |
| 2019 | 71 | 124 |
| 2020 | 94 | 184 |
| 2021 | 104 | 178 |
| 2022 | 106 | 167 |
| 2023 | 107 | 150 |
| 2024 | 114 | 169 |
| 2025 | 86 | 152 |
| 2026 | 76 | 126 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2325/0283Pore sizeIndexing code749
- B01D 2325/022Asymmetric membranesIndexing code517
- B01D 2325/021Pore shapesIndexing code171
- B01D 2325/028Microfluidic pore structuresIndexing code79
- B01D 2325/026Sponge structureIndexing code58
- B01D 2325/0281Fibril, or microfibril structuresIndexing code57
- B01D 2325/0282Dynamic pores-stimuli responsive membranesIndexing code30
- B01D 2325/027Nonporous membranesIndexing code26
All 9 subgroupsShow fewer
Recent patents
- Hybrid system and method of waste heat utilization-based photovoltaic power generation and seawater desalination6 Oct 2026US 12,752,240 B2Xi' An Jiaotong University
- Eco-friendly membranes for separations6 Oct 2026US 12,752,241 B2Khalifa University of Science and Technology
- Hollow fiber microporous membrane, and gas separation membrane module with same built thereinto6 Oct 2026US 12,752,243 B2Toray Industries, Inc.
- circCDK13-enriched engineered small extracellular vesicle (E-sEV), and preparation method and use thereof22 Sep 2026US 12,740,945 B2Chinese Pla General Hospital
- Carbon molecular sieve membranes based on oxygen-free polymeric precursors22 Sep 2026US 12,741,250 B2King Abdullah University of Science and Technology
- Modular multiplatform system for mrna drug production8 Oct 2026US 2026/0306407 A1BioNTech SE
- Direct air capture of carbon dioxide with nanofluidic flows8 Oct 2026US 2026/0307002 A1National Technology & Engineering Solutions of Sandia, LLC
- Porous membrane and purification method8 Oct 2026US 2026/0307015 A1Toyobo Co., Ltd.
- Substrate for liquid filter and liquid filter8 Oct 2026US 2026/0307016 A1Teijin Limited
- Purge device and production method for separation membrane1 Oct 2026US 2026/0295514 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Mesoscale sample preparation device and systems for determination and processing of analytes678US 5,726,026 AThe Trustees of the University of Pennsylvania · 1998
- Mesoscale sample preparation device and systems for determination and processing of analytes335US 5,928,880 AThe Trustees of the University of Pennsylvania · 1999
- Asymmetric membranes315US 4,629,563 ABrunswick Corporation · 1986
- Process for preparing hydrophilic polyamide membrane filter media and product277US 4,340,479 APall Corporation · 1982
- Porous PTFE materials and articles produced therefrom267US 7,306,729 B2Gore Enterprise Holdings, Inc. · 2007