B01D 2325/28
Degradation or stability over time
B01D2325/28 (Degradation or stability over time) appears on 151 US grants and 228 published applications in this corpus.
Search patents in B01D- Granted patents
- 151
- Published applications
- 228
- Assignees
- 163
- Inventors
- 668
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 4 |
| 2004 | 0 | 4 |
| 2005 | 0 | 3 |
| 2006 | 3 | 7 |
| 2007 | 3 | 8 |
| 2008 | 4 | 7 |
| 2009 | 3 | 11 |
| 2010 | 2 | 12 |
| 2011 | 10 | 8 |
| 2012 | 9 | 8 |
| 2013 | 4 | 6 |
| 2014 | 9 | 9 |
| 2015 | 5 | 14 |
| 2016 | 2 | 12 |
| 2017 | 11 | 10 |
| 2018 | 8 | 13 |
| 2019 | 8 | 17 |
| 2020 | 13 | 19 |
| 2021 | 17 | 10 |
| 2022 | 8 | 10 |
| 2023 | 9 | 10 |
| 2024 | 5 | 15 |
| 2025 | 8 | 7 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Composite semipermeable membrane, composite semipermeable membrane module, fluid separation device, and method for producing composite semipermeable membrane6 Aug 2026US 2026/0225045 A1Toray Industries, Inc.
- Ionic liquid-based composite membranes using functional cross-linkers16 Jul 2026US 2026/0199823 A1The Regents of the University of Colorado, a body corporate
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- Membranes having a crosslinked block copolymer and processes for making same11 Dec 2025US 2025/0375740 A1Entegris, Inc.
- Method for manufacturing a thin-film composite membrane for water treatment, having extreme acid and alkaline stability16 Oct 2025US 2025/0319443 A1Korea University Research and Business Foundation
Most cited
By later US patents
- Combined membrane and sorption process for selective ion removal79US 4,806,244 AThe Dow Chemical Company · 1989
- Process for manufacture of a porous polymer by use of a porogen58US 6,060,530 ACommonwealth Scientific and Industrial Research Organization · 2000
- Asymmetric gel-filled microporous membranes52US 7,247,370 B2McMaster University · 2007
- Synthesis of SiO.sub.2 membrane on porous support and method of use of same31US 4,902,307 ACalifornia Institute of Technology · 1990
- Semipermeable polymers and method for producing same31US 8,147,735 B2Eltron Research & Development, Inc. · 2012