B01D 71/00
Semi-permeable membranes for separation processes or apparatus characterised by the material
Official title: Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
B01D71/00 (Semi-permeable membranes for separation processes or apparatus characterised by the material) appears on 7,891 US grants and 8,952 published applications in this corpus.
Search patents in B01D- Granted patents
- 7,891
- Published applications
- 8,952
- Assignees
- 3,005
- Inventors
- 18,077
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 53 | 0 |
| 1977 | 39 | 0 |
| 1978 | 56 | 0 |
| 1979 | 33 | 0 |
| 1980 | 54 | 0 |
| 1981 | 65 | 0 |
| 1982 | 43 | 0 |
| 1983 | 47 | 0 |
| 1984 | 59 | 0 |
| 1985 | 51 | 0 |
| 1986 | 64 | 0 |
| 1987 | 91 | 0 |
| 1988 | 102 | 0 |
| 1989 | 139 | 0 |
| 1990 | 151 | 0 |
| 1991 | 159 | 0 |
| 1992 | 140 | 0 |
| 1993 | 113 | 0 |
| 1994 | 86 | 0 |
| 1995 | 77 | 0 |
| 1996 | 78 | 0 |
| 1997 | 97 | 0 |
| 1998 | 113 | 0 |
| 1999 | 119 | 0 |
| 2000 | 104 | 0 |
| 2001 | 99 | 27 |
| 2002 | 104 | 120 |
| 2003 | 112 | 164 |
| 2004 | 103 | 203 |
| 2005 | 86 | 201 |
| 2006 | 95 | 237 |
| 2007 | 119 | 235 |
| 2008 | 107 | 218 |
| 2009 | 115 | 272 |
| 2010 | 174 | 319 |
| 2011 | 173 | 309 |
| 2012 | 198 | 322 |
| 2013 | 213 | 360 |
| 2014 | 251 | 376 |
| 2015 | 260 | 485 |
| 2016 | 268 | 447 |
| 2017 | 312 | 463 |
| 2018 | 315 | 437 |
| 2019 | 352 | 487 |
| 2020 | 398 | 549 |
| 2021 | 386 | 500 |
| 2022 | 334 | 467 |
| 2023 | 310 | 468 |
| 2024 | 331 | 518 |
| 2025 | 325 | 420 |
| 2026 | 218 | 348 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Eco-friendly membranes for separations6 Oct 2026US 12,752,241 B2Khalifa University of Science and Technology
- Cross-linked mineral membranes6 Oct 2026US 12,752,244 B2Uchicago Argonne, LLC
- Feedstock solution flow concentration system29 Sep 2026US 12,746,511 B2Asahi Kasei Kabushiki Kaisha
- Microfluidic purification device29 Sep 2026US 12,746,548 B2Oriental System Technology Inc.
- Mixed gas separation method and mixed gas separation apparatus22 Sep 2026US 12,741,246 B2NGK Insulators, Ltd.
- 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
- 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
Most cited
By later US patents
- Process for producing porous products1,316US 3,953,566 AW. L. Gore & Associates, Inc. · 1976
- Techniques to improve polyurethane membranes for implantable glucose sensors1,046US 7,226,978 B2DexCom, Inc. · 2007
- Mesoscale polynucleotide amplification device and method1,042US 5,498,392 AThe Trustees of the University of Pennsylvania · 1996
- Melt-blown fibrous web1,019US 5,582,907 APall Corporation · 1996
- Porous products and process therefor909US 4,187,390 AW. L. Gore & Associates, Inc. · 1980