B01D 2325/00
Details relating to properties of membranes
B01D2325/00 (Details relating to properties of membranes) appears on 4,461 US grants and 6,301 published applications in this corpus.
Search patents in B01D- Granted patents
- 4,461
- Published applications
- 6,301
- Assignees
- 2,268
- Inventors
- 12,607
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 10 | 0 |
| 1979 | 4 | 0 |
| 1980 | 6 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 2 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 18 | 0 |
| 1987 | 22 | 0 |
| 1988 | 24 | 0 |
| 1989 | 40 | 0 |
| 1990 | 41 | 0 |
| 1991 | 28 | 0 |
| 1992 | 36 | 0 |
| 1993 | 44 | 0 |
| 1994 | 23 | 0 |
| 1995 | 24 | 0 |
| 1996 | 25 | 0 |
| 1997 | 44 | 0 |
| 1998 | 52 | 0 |
| 1999 | 69 | 0 |
| 2000 | 52 | 0 |
| 2001 | 51 | 13 |
| 2002 | 47 | 56 |
| 2003 | 50 | 91 |
| 2004 | 43 | 95 |
| 2005 | 48 | 111 |
| 2006 | 53 | 144 |
| 2007 | 69 | 174 |
| 2008 | 74 | 155 |
| 2009 | 70 | 207 |
| 2010 | 99 | 209 |
| 2011 | 120 | 206 |
| 2012 | 143 | 203 |
| 2013 | 130 | 232 |
| 2014 | 151 | 202 |
| 2015 | 152 | 323 |
| 2016 | 172 | 298 |
| 2017 | 223 | 341 |
| 2018 | 202 | 276 |
| 2019 | 246 | 328 |
| 2020 | 267 | 413 |
| 2021 | 277 | 409 |
| 2022 | 241 | 375 |
| 2023 | 238 | 368 |
| 2024 | 260 | 414 |
| 2025 | 261 | 378 |
| 2026 | 178 | 280 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2325/02Details relating to pores or porosity of the membranesIndexing code1,587
- B01D 2325/04Characteristic thicknessIndexing code807
- B01D 2325/20Specific permeability or cut-off rangeIndexing code760
- B01D 2325/36Hydrophilic membranesIndexing code542
- B01D 2325/38Hydrophobic membranesIndexing code435
- B01D 2325/24Mechanical propertiesIndexing code370
- B01D 2325/26Electrical propertiesIndexing code344
- B01D 2325/42Ion-exchange membranesIndexing code332
All 30 subgroupsShow fewer
- B01D 2325/14Membrane materials having negatively charged functional groupsIndexing code239
- B01D 2325/08Patterned membranesIndexing code218
- B01D 2325/10Catalysts being present on the surface of the membrane or in theIndexing code205
- B01D 2325/16Membrane materials having positively charged functional groupsIndexing code205
- B01D 2325/34Molecular weight or degree of polymerisationIndexing code204
- B01D 2325/30Chemical resistanceIndexing code203
- B01D 2325/22Thermal or heat-resistance propertiesIndexing code188
- B01D 2325/48Antimicrobial propertiesIndexing code188
- B01D 2325/12Adsorbents being present on the surface of the membranes or in theIndexing code158
- B01D 2325/28Degradation or stability over timeIndexing code151
- B01D 2325/06Surface irregularitiesIndexing code140
- B01D 2325/18Membrane materials having mixed charged functional groupsIndexing code93
- B01D 2325/40Fibre reinforced membranesIndexing code77
- B01D 2325/32Melting point or glass-transition temperaturesIndexing code43
- B01D 2325/43Specific optical propertiesIndexing code33
- B01D 2325/50Membrane in gel formIndexing code30
- B01D 2325/52CrystallinityIndexing code23
- B01D 2325/39Amphiphilic membranesIndexing code14
- B01D 2325/46Magnetic propertiesIndexing code10
- B01D 2325/54Interpenetration relationship between layers in supported or composite membranesIndexing code3
- B01D 2325/58Biocompatibility of membraneIndexing code3
- B01D 2325/56Biodegradability of membraneIndexing code0
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.
- Method of forming a cross-linked polymeric membrane29 Sep 2026US 12,746,516 B2Seppure Pte Ltd
- Ion exchange membrane composition and methods for the concentration of perfluoroalkyl substances29 Sep 2026US 12,747,172 B2Evoqua Water Technologies LLC
- Concentrated milk protein preparations8 Oct 2026US 2026/0305634 A150G Inc.
- 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
- Salt-rejecting continuous passive solar thermal desalination via thin-film condensation8 Oct 2026US 2026/0307012 A1The Regents of the University of California
- Porous membrane and purification method8 Oct 2026US 2026/0307015 A1Toyobo Co., 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
- Porous microfabricated polymer membrane structures460US 5,807,406 ABaxter International Inc. · 1998
- Hemostatic system and components for extracorporeal circuit379US 6,733,471 B1Medtronic, Inc. · 2004
- 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