B01D 69/00
Semi-permeable membranes for separation processes or apparatus characterised by their form, structure
Official title: Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
B01D69/00 (Semi-permeable membranes for separation processes or apparatus characterised by their form, structure) appears on 6,687 US grants and 8,174 published applications in this corpus.
Search patents in B01D- Granted patents
- 6,687
- Published applications
- 8,174
- Assignees
- 2,857
- Inventors
- 16,173
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 27 | 0 |
| 1977 | 28 | 0 |
| 1978 | 38 | 0 |
| 1979 | 17 | 0 |
| 1980 | 39 | 0 |
| 1981 | 37 | 0 |
| 1982 | 36 | 0 |
| 1983 | 34 | 0 |
| 1984 | 30 | 0 |
| 1985 | 24 | 0 |
| 1986 | 40 | 0 |
| 1987 | 66 | 0 |
| 1988 | 86 | 0 |
| 1989 | 119 | 0 |
| 1990 | 124 | 0 |
| 1991 | 95 | 0 |
| 1992 | 106 | 0 |
| 1993 | 91 | 0 |
| 1994 | 61 | 0 |
| 1995 | 61 | 0 |
| 1996 | 59 | 0 |
| 1997 | 88 | 0 |
| 1998 | 92 | 0 |
| 1999 | 87 | 0 |
| 2000 | 65 | 0 |
| 2001 | 86 | 20 |
| 2002 | 81 | 117 |
| 2003 | 88 | 158 |
| 2004 | 78 | 167 |
| 2005 | 89 | 178 |
| 2006 | 83 | 195 |
| 2007 | 96 | 177 |
| 2008 | 92 | 180 |
| 2009 | 99 | 222 |
| 2010 | 131 | 245 |
| 2011 | 148 | 244 |
| 2012 | 168 | 271 |
| 2013 | 161 | 310 |
| 2014 | 184 | 312 |
| 2015 | 210 | 419 |
| 2016 | 222 | 389 |
| 2017 | 272 | 381 |
| 2018 | 263 | 399 |
| 2019 | 308 | 457 |
| 2020 | 350 | 541 |
| 2021 | 366 | 514 |
| 2022 | 330 | 506 |
| 2023 | 313 | 456 |
| 2024 | 344 | 513 |
| 2025 | 344 | 437 |
| 2026 | 231 | 366 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 69/02Semi-permeable membranes for separation processes or apparatus characterised by their form, structure2,820
- B01D 69/12Composite membranes2,393
- B01D 69/10Supported membranes1,650
- B01D 69/08Hollow fibre membranes1,390
- B01D 69/14Dynamic membranes1,366
- B01D 69/06Flat membranes317
- B01D 69/04Tubular membranes276
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.
- Cross-linked mineral membranes6 Oct 2026US 12,752,244 B2Uchicago Argonne, LLC
- 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.
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- 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
Most cited
By later US patents
- Techniques to improve polyurethane membranes for implantable glucose sensors1,046US 7,226,978 B2DexCom, Inc. · 2007
- Ionic semiconductor materials and applications thereof795US 5,055,171 AT and G Corporation · 1991
- Surface-modifying endgroups for biomedical polymers517US 5,589,563 AThe Polymer Technology Group · 1996
- Porous microfabricated polymer membrane structures460US 5,807,406 ABaxter International Inc. · 1998
- Functional, photochemically active, and chemically asymmetric membranes by interfacial polymerization of derivatized multifunctional prepolymers410US 4,784,736 ABend Research, Inc. · 1988