B01D 53/228
Characterised by specific membranes
Official title: {characterised by specific membranes}
B01D53/228 (Characterised by specific membranes) appears on 2,042 US grants and 2,454 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,042
- Published applications
- 2,454
- Assignees
- 949
- Inventors
- 4,812
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 11 | 0 |
| 1989 | 12 | 0 |
| 1990 | 11 | 0 |
| 1991 | 8 | 0 |
| 1992 | 13 | 0 |
| 1993 | 13 | 0 |
| 1994 | 22 | 0 |
| 1995 | 19 | 0 |
| 1996 | 12 | 0 |
| 1997 | 31 | 0 |
| 1998 | 33 | 0 |
| 1999 | 36 | 0 |
| 2000 | 27 | 0 |
| 2001 | 35 | 10 |
| 2002 | 31 | 39 |
| 2003 | 51 | 50 |
| 2004 | 34 | 63 |
| 2005 | 28 | 63 |
| 2006 | 36 | 55 |
| 2007 | 39 | 77 |
| 2008 | 36 | 55 |
| 2009 | 33 | 68 |
| 2010 | 47 | 78 |
| 2011 | 58 | 74 |
| 2012 | 58 | 87 |
| 2013 | 65 | 94 |
| 2014 | 73 | 109 |
| 2015 | 88 | 151 |
| 2016 | 87 | 156 |
| 2017 | 124 | 132 |
| 2018 | 118 | 132 |
| 2019 | 101 | 152 |
| 2020 | 96 | 121 |
| 2021 | 109 | 135 |
| 2022 | 91 | 105 |
| 2023 | 91 | 111 |
| 2024 | 98 | 135 |
| 2025 | 81 | 104 |
| 2026 | 55 | 98 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mixed gas separation method and mixed gas separation apparatus22 Sep 2026US 12,741,246 B2NGK Insulators, Ltd.
- Carbon molecular sieve membranes based on oxygen-free polymeric precursors22 Sep 2026US 12,741,250 B2King Abdullah University of Science and Technology
- Dual-layer hollow fiber membranes and methods of making and use22 Sep 2026US 12,741,269 B2The Regents of the University of Michigan
- Membrane permeate recycle with pressurized anaerobic digesters15 Sep 2026US 12,734,475 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Ruthenium promoter catalyst compositions15 Sep 2026US 12,735,324 B2Commonwealth Scientific and Industrial Research Organisation
- Modified polyvinylidene fluoride membranes for water filtration8 Oct 2026US 2026/0307011 A1Uchicago Argonne, LLC
- Hydrogen generation device8 Oct 2026US 2026/0307031 A1
- Hydrogen generation apparatus8 Oct 2026US 2026/0307037 A1
- Systems and methods for using facilitated transport membranes to separate olefins and paraffins8 Oct 2026US 2026/0308087 A1
- Purge device and production method for separation membrane1 Oct 2026US 2026/0295514 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Membranes of polyurethane based materials including polyester polyols364US 6,321,465 B1NIKE, Inc. · 2001
- Multicomponent membranes for gas separations355US 4,230,463 AMonsanto Company · 1980
- Hydrogen gas-extraction module and method of fabrication341US 6,152,987 AWorcester Polytechnic Institute · 2000
- Steam reformer with internal hydrogen purification269US 5,997,594 ANorthwest Power Systems, LLC · 1999
- Composite hydrogen separation element and module185US 5,498,278 ABend Research, Inc. · 1996