B01D 71/68
Polysulfones
Official title: Polysulfones; Polyethersulfones
B01D71/68 (Polysulfones) appears on 927 US grants and 1,231 published applications in this corpus.
Search patents in B01D- Granted patents
- 927
- Published applications
- 1,231
- Assignees
- 562
- Inventors
- 2,794
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 14 | 0 |
| 1990 | 16 | 0 |
| 1991 | 11 | 0 |
| 1992 | 14 | 0 |
| 1993 | 9 | 0 |
| 1994 | 6 | 0 |
| 1995 | 12 | 0 |
| 1996 | 5 | 0 |
| 1997 | 12 | 0 |
| 1998 | 5 | 0 |
| 1999 | 16 | 0 |
| 2000 | 15 | 0 |
| 2001 | 10 | 4 |
| 2002 | 8 | 16 |
| 2003 | 9 | 12 |
| 2004 | 8 | 28 |
| 2005 | 10 | 26 |
| 2006 | 12 | 21 |
| 2007 | 17 | 17 |
| 2008 | 12 | 23 |
| 2009 | 8 | 20 |
| 2010 | 12 | 35 |
| 2011 | 19 | 37 |
| 2012 | 18 | 34 |
| 2013 | 21 | 44 |
| 2014 | 30 | 43 |
| 2015 | 37 | 84 |
| 2016 | 30 | 61 |
| 2017 | 36 | 68 |
| 2018 | 42 | 62 |
| 2019 | 59 | 84 |
| 2020 | 56 | 73 |
| 2021 | 56 | 72 |
| 2022 | 46 | 84 |
| 2023 | 46 | 72 |
| 2024 | 65 | 84 |
| 2025 | 47 | 73 |
| 2026 | 34 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual-layer hollow fiber membranes and methods of making and use22 Sep 2026US 12,741,269 B2The Regents of the University of Michigan
- Bioprocess with reduced fouling on surfaces15 Sep 2026US 12,734,465 B2Nutrition & Biosciences USA 1, LLC
- Point of use or point of dispense filter with multiple pleat packs15 Sep 2026US 12,734,488 B2Entegris, Inc.
- Cell retention device18 Aug 2026US 12,708,876 B2Sunflower Therapeutics, PBC
- Composite semipermeable membrane, spiral membrane element, water treatment system, and water treatment method18 Aug 2026US 12,708,880 B2Nitto Denko Corporation
- Membrane-adsorption process for direct air capture8 Oct 2026US 2026/0307001 A1Ohio State Innovation Foundation
- Porous membrane and purification method8 Oct 2026US 2026/0307015 A1Toyobo Co., Ltd.
- Ion exchange membrane8 Oct 2026US 2026/0307020 A1Khalifa University of Science and Technology
- Polyether Sulfone Copolymers and Articles Prepared Therefrom8 Oct 2026US 2026/0308326 A1Thermo Fisher Bioprocessing Inc.
- Hollow fiber membranes comprising a poly(aryl ether sulfone) and a water-soluble polymer additive1 Oct 2026US 2026/0295540 A1BASF SE
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
- Hydrophilic polymeric phase inversion membrane206US 6,071,406 AWhatman, Inc. · 2000
- Process for producing microporous powders and membranes180US 4,968,733 AAkzo N. V. · 1990
- Composite solid polymer electrolyte membranes158US 6,248,469 B1Foster-Miller, Inc. · 2001