B01D 2325/18
Membrane materials having mixed charged functional groups
B01D2325/18 (Membrane materials having mixed charged functional groups) appears on 93 US grants and 134 published applications in this corpus.
Search patents in B01D- Granted patents
- 93
- Published applications
- 134
- Assignees
- 102
- Inventors
- 349
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 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 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 4 |
| 2008 | 0 | 3 |
| 2009 | 0 | 5 |
| 2010 | 1 | 5 |
| 2011 | 7 | 5 |
| 2012 | 2 | 5 |
| 2013 | 0 | 2 |
| 2014 | 3 | 3 |
| 2015 | 4 | 8 |
| 2016 | 6 | 7 |
| 2017 | 6 | 4 |
| 2018 | 2 | 5 |
| 2019 | 2 | 11 |
| 2020 | 6 | 9 |
| 2021 | 7 | 9 |
| 2022 | 9 | 8 |
| 2023 | 4 | 15 |
| 2024 | 5 | 9 |
| 2025 | 9 | 8 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compounds, compositions and polymer films19 May 2026US 12,630,502 B2FUJIFILM Corporation
- Laminate12 May 2026US 12,623,444 B2Daicel Corporation
- Cross-linkable zwitterionic polymers and their use in membrane filters21 Apr 2026US 12,605,680 B2Trustees of Tufts College
- Compositions and polymer films27 Jan 2026US 12,534,583 B2FUJIFILM Corporation
- Composite membrane6 Jan 2026US 12,515,175 B2FUJIFILM Corporation
- Modified nanocellulose membranes and their use in filtration20 Aug 2026US 2026/0241344 A1Board of Trustees of the University of Arkansas
- Cross-linkable zwitterionic polymers and their use in membrane filters30 Jul 2026US 2026/0216671 A1Trustees of Tufts College
- Method for making cross-linkable zwitterionic polymer membranes and their use23 Jul 2026US 2026/0208123 A1Trustees of Tufts College
- Zwitterion anti-scaling membrane coatings9 Jul 2026US 2026/0192259 A1Arizona Board of Regents on behalf of Arizona State University
- Uremic metabolite-zwitterionic hemocompatible dialysis membranes4 Jun 2026US 2026/0151743 A1University of Saskatchewan
Most cited
By later US patents
- Two component-three dimensional catalysis105US 6,355,093 B1Eltron Research, Inc. · 2002
- Solid state oxygen anion and electron mediating membrane and catalytic membrane reactors containing them47US 6,033,632 AEltron Research, Inc. · 2000
- Cationically charge-modified membranes35US 6,045,694 AUSF Filtration and Separations Group, Inc. · 2000
- Supported ion exchange membrane films28US 4,650,551 AThe Dow Chemical Company · 1987
- Cationically charge-modified membranes28US 6,565,748 B1Pall Corporation · 2003