B01D 2323/00
Details relating to membrane preparation
B01D2323/00 (Details relating to membrane preparation) appears on 3,760 US grants and 4,602 published applications in this corpus.
Search patents in B01D- Granted patents
- 3,760
- Published applications
- 4,602
- Assignees
- 1,756
- Inventors
- 9,783
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 11 | 0 |
| 1978 | 10 | 0 |
| 1979 | 6 | 0 |
| 1980 | 10 | 0 |
| 1981 | 15 | 0 |
| 1982 | 10 | 0 |
| 1983 | 6 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 26 | 0 |
| 1987 | 32 | 0 |
| 1988 | 40 | 0 |
| 1989 | 55 | 0 |
| 1990 | 68 | 0 |
| 1991 | 57 | 0 |
| 1992 | 53 | 0 |
| 1993 | 44 | 0 |
| 1994 | 42 | 0 |
| 1995 | 33 | 0 |
| 1996 | 34 | 0 |
| 1997 | 49 | 0 |
| 1998 | 59 | 0 |
| 1999 | 57 | 0 |
| 2000 | 51 | 0 |
| 2001 | 54 | 14 |
| 2002 | 51 | 57 |
| 2003 | 48 | 90 |
| 2004 | 53 | 99 |
| 2005 | 46 | 112 |
| 2006 | 50 | 117 |
| 2007 | 56 | 130 |
| 2008 | 70 | 154 |
| 2009 | 66 | 171 |
| 2010 | 99 | 209 |
| 2011 | 112 | 166 |
| 2012 | 128 | 186 |
| 2013 | 126 | 198 |
| 2014 | 127 | 189 |
| 2015 | 135 | 270 |
| 2016 | 166 | 234 |
| 2017 | 172 | 231 |
| 2018 | 173 | 198 |
| 2019 | 170 | 231 |
| 2020 | 167 | 259 |
| 2021 | 181 | 233 |
| 2022 | 142 | 217 |
| 2023 | 137 | 220 |
| 2024 | 171 | 245 |
| 2025 | 170 | 204 |
| 2026 | 98 | 168 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 2323/30Cross-linkingIndexing code1,021
- B01D 2323/08Specific temperatures appliedIndexing code800
- B01D 2323/12Specific ratios of components usedIndexing code733
- B01D 2323/15Use of additivesIndexing code548
- B01D 2323/34Use of radiationIndexing code367
- B01D 2323/38Graft polymerizationIndexing code276
- B01D 2323/42Details of membrane preparation apparatusIndexing code276
- B01D 2323/02HydrophilizationIndexing code271
All 33 subgroupsShow fewer
- B01D 2323/40In-situ membrane formationIndexing code228
- B01D 2323/36Introduction of specific chemical groupsIndexing code201
- B01D 2323/219Specific solvent systemIndexing code183
- B01D 2323/39ElectrospinningIndexing code150
- B01D 2323/46ImpregnationIndexing code135
- B01D 2323/28Pore treatmentsIndexing code127
- B01D 2323/24Use of template or surface directing agents [sda]Indexing code119
- B01D 2323/10Specific pressure appliedIndexing code109
- B01D 2323/04HydrophobizationIndexing code99
- B01D 2323/06Specific viscosities of materials involvedIndexing code99
- B01D 2323/26Spraying processesIndexing code67
- B01D 2323/50Control of the membrane preparation processIndexing code46
- B01D 2323/35Use of magnetic or electrical fieldsIndexing code42
- B01D 2323/48Influencing the phIndexing code34
- B01D 2323/14Ageing featuresIndexing code33
- B01D 2323/60Co-castingIndexing code27
- B01D 2323/64Use of a temporary supportIndexing code18
- B01D 2323/52Use of a mouldIndexing code14
- B01D 2323/66Avoiding penetration into pores of support of further porous layer with fluidIndexing code13
- B01D 2323/56Use of ultrasoundIndexing code10
- B01D 2323/32Use of chain transfer agents or inhibitorsIndexing code9
- B01D 2323/44Relaxation stepsIndexing code7
- B01D 2323/58FusionIndexing code7
- B01D 2323/62Cutting the membraneIndexing code6
- B01D 2323/54Recycling of scrap material from production process or membrane fragmentsIndexing code2
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
- Method of forming a cross-linked polymeric membrane29 Sep 2026US 12,746,516 B2Seppure Pte Ltd
- Carbon molecular sieve membranes based on oxygen-free polymeric precursors22 Sep 2026US 12,741,250 B2King Abdullah University of Science and Technology
- 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
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Contorted polyamide membranes and methods of use thereof8 Oct 2026US 2026/0307019 A1University of Houston System
- Ion exchange membrane8 Oct 2026US 2026/0307020 A1Khalifa University of Science and Technology
- Conductive hollow fiber membrane and preparation method thereof and membrane assembly24 Sep 2026US 2026/0284601 A1Cangzhou Institute of Tiangong University
- Conductive base membrane and preparation method thereof24 Sep 2026US 2026/0284606 A1Beijing Baoshengtong International Electrical Engineering Technology Co., Ltd.
Most cited
By later US patents
- Multicomponent membranes for gas separations355US 4,230,463 AMonsanto Company · 1980
- Composite solid polymer electrolyte membranes346US 7,550,216 B2Foster-Miller, Inc. · 2009
- Hydrogen gas-extraction module and method of fabrication341US 6,152,987 AWorcester Polytechnic Institute · 2000
- Plasma concentrate and tissue sealant methods and apparatuses for making concentrated plasma and/or tissue sealant316US 5,585,007 APlasmaseal LLC · 1996
- Asymmetric membranes315US 4,629,563 ABrunswick Corporation · 1986