B01D 69/02
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure
Official title: characterised by their properties
B01D69/02 (Semi-permeable membranes for separation processes or apparatus characterised by their form, structure) appears on 2,820 US grants and 4,136 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,820
- Published applications
- 4,136
- Assignees
- 1,603
- Inventors
- 8,802
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 13 | 0 |
| 1987 | 11 | 0 |
| 1988 | 19 | 0 |
| 1989 | 35 | 0 |
| 1990 | 27 | 0 |
| 1991 | 22 | 0 |
| 1992 | 25 | 0 |
| 1993 | 22 | 0 |
| 1994 | 16 | 0 |
| 1995 | 17 | 0 |
| 1996 | 19 | 0 |
| 1997 | 34 | 0 |
| 1998 | 37 | 0 |
| 1999 | 38 | 0 |
| 2000 | 21 | 0 |
| 2001 | 27 | 6 |
| 2002 | 29 | 49 |
| 2003 | 30 | 66 |
| 2004 | 27 | 62 |
| 2005 | 32 | 51 |
| 2006 | 22 | 86 |
| 2007 | 39 | 62 |
| 2008 | 37 | 65 |
| 2009 | 38 | 89 |
| 2010 | 53 | 91 |
| 2011 | 56 | 83 |
| 2012 | 65 | 100 |
| 2013 | 51 | 95 |
| 2014 | 68 | 109 |
| 2015 | 56 | 189 |
| 2016 | 87 | 175 |
| 2017 | 111 | 190 |
| 2018 | 125 | 223 |
| 2019 | 150 | 243 |
| 2020 | 192 | 305 |
| 2021 | 203 | 317 |
| 2022 | 174 | 315 |
| 2023 | 175 | 307 |
| 2024 | 193 | 324 |
| 2025 | 234 | 300 |
| 2026 | 147 | 234 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- 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
- circCDK13-enriched engineered small extracellular vesicle (E-sEV), and preparation method and use thereof22 Sep 2026US 12,740,945 B2Chinese Pla General Hospital
- Concentrated milk protein preparations8 Oct 2026US 2026/0305634 A150G Inc.
- Modular multiplatform system for mrna drug production8 Oct 2026US 2026/0306407 A1BioNTech SE
- Membrane-adsorption process for direct air capture8 Oct 2026US 2026/0307001 A1Ohio State Innovation Foundation
- 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
Most cited
By later US patents
- Porous microfabricated polymer membrane structures460US 5,807,406 ABaxter International Inc. · 1998
- Membranes of polyurethane based materials including polyester polyols364US 6,321,465 B1NIKE, Inc. · 2001
- Asymmetric membranes315US 4,629,563 ABrunswick Corporation · 1986
- Porous PTFE materials and articles produced therefrom267US 7,306,729 B2Gore Enterprise Holdings, Inc. · 2007
- Membrane filter and a method of manufacturing the same as well as a membrane218US 5,753,014 A1998