B01D 71/48
Polyesters
B01D71/48 (Polyesters) appears on 188 US grants and 219 published applications in this corpus.
Search patents in B01D- Granted patents
- 188
- Published applications
- 219
- Assignees
- 165
- Inventors
- 657
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 7 | 0 |
| 1991 | 11 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 3 |
| 2003 | 0 | 2 |
| 2004 | 4 | 6 |
| 2005 | 3 | 5 |
| 2006 | 0 | 1 |
| 2007 | 3 | 0 |
| 2008 | 1 | 3 |
| 2009 | 1 | 6 |
| 2010 | 2 | 4 |
| 2011 | 3 | 4 |
| 2012 | 1 | 5 |
| 2013 | 4 | 8 |
| 2014 | 1 | 11 |
| 2015 | 8 | 14 |
| 2016 | 7 | 15 |
| 2017 | 9 | 9 |
| 2018 | 6 | 10 |
| 2019 | 8 | 11 |
| 2020 | 10 | 17 |
| 2021 | 13 | 11 |
| 2022 | 7 | 16 |
| 2023 | 10 | 12 |
| 2024 | 2 | 18 |
| 2025 | 16 | 16 |
| 2026 | 5 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Eco-friendly membranes for separations6 Oct 2026US 12,752,241 B2Khalifa University of Science and Technology
- Surface-treated porous materials having filtration properties and methods of preparing them18 Aug 2026US 12,708,879 B2Aculon, Inc.
- Filtration device23 Jun 2026US 12,661,618 B2Gambro Lundia AB
- Air filter medium, pleated filter medium, air filter unit, mask filter medium, and method for regenerating air filter medium27 Jan 2026US 12,533,614 B2Daikin Industries, Ltd.
- Organic solvent-soluble copolymer polyester, composition for forming ultrafiltration membrane comprising same, and high water permeability reverse osmosis membrane prepared therefrom6 Jan 2026US 12,516,150 B2Toray Advanced Materials Korea Inc.
- Membrane-adsorption process for direct air capture8 Oct 2026US 2026/0307001 A1Ohio State Innovation Foundation
- Ultrafast water flux through hot-pressed solution blown spun nanofiber-based thin film composite membranes for forward osmosis23 Jul 2026US 2026/0208117 A1Qatar University
- Spiral membrane element and method for producing the same25 Jun 2026US 2026/0175176 A1Nitto Denko Corporation
- Pha based microporous articles and methods of forming the same18 Jun 2026US 2026/0167786 A1W. L. Gore & Associates, Inc.
- Fluid filtration membranes28 May 2026US 2026/0145142 A1Khalifa University of Science and Technology
Most cited
By later US patents
- Biocompatible polymer membranes and methods of preparation of three dimensional membrane structures297US 5,514,378 AChildren's Medical Center Corporation · 1996
- Modified membranes85US 7,300,022 B2Siemens Water Technologies Corp. · 2007
- Gas separations utilizing glassy polymer membranes at sub-ambient temperatures80US 5,837,032 AThe Cynara Company · 1998
- Microporous polyester membranes and polymer assisted phase inversion process for their manufacture77US 3,957,651 AChemical Systems, Inc. · 1976
- Polyurethane polyene compositions68US 4,454,309 ATyndale Plains-Hunter, Ltd. · 1984