B01D 71/643
Polyether-imides
Official title: {Polyether-imides}
B01D71/643 (Polyether-imides) appears on 138 US grants and 156 published applications in this corpus.
Search patents in B01D- Granted patents
- 138
- Published applications
- 156
- Assignees
- 100
- Inventors
- 369
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 6 | 7 |
| 2003 | 3 | 4 |
| 2004 | 2 | 3 |
| 2005 | 1 | 6 |
| 2006 | 2 | 7 |
| 2007 | 3 | 3 |
| 2008 | 2 | 4 |
| 2009 | 5 | 2 |
| 2010 | 2 | 5 |
| 2011 | 2 | 6 |
| 2012 | 4 | 6 |
| 2013 | 4 | 4 |
| 2014 | 2 | 4 |
| 2015 | 2 | 15 |
| 2016 | 7 | 16 |
| 2017 | 13 | 9 |
| 2018 | 9 | 9 |
| 2019 | 7 | 8 |
| 2020 | 8 | 9 |
| 2021 | 7 | 9 |
| 2022 | 4 | 6 |
| 2023 | 5 | 3 |
| 2024 | 6 | 9 |
| 2025 | 4 | 1 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluid separation membranes and use thereof7 Jul 2026US 12,673,298 B1Semicom Dwc-LLC
- Method of creating greater adhesion between asymmetric PVDF active layer and PEI fiber support to obtain multilayer janus membrane30 Jun 2026US 12,667,812 B1King Fahd University of Petroleum and Minerals
- Apparatus for enriching the concentration of trace components in air flow31 Mar 2026US 12,589,361 B2Virginia Tech Intellectual Properties, Inc.
- Solvent-resistant self-crosslinked poly(ether imide)s2 Dec 2025US 12,486,370 B2Virginia Tech Intellectual Properties, Inc.
- Composite membrane comprising highly permeable gutter layer and method for preparing same23 Sep 2025US 12,420,240 B2Korea Research Institute of Chemical Technology
- Nano-membrane, electronic device including the same, and method for manufacturing the nano-membrane23 Jul 2026US 2026/0209030 A1Kolon Industries, Inc.
- Advanced carbon molecular sieve membranes derived from composite polyimide hollow fiber precursors17 Apr 2025US 2025/0121333 A1Georgia Tech Research Corporation
- Systems and methods for protein recovery24 Oct 2024US 2024/0350974 A1Solecta Ltd.
- Polyimide copolymers and membranes, preparation methods and uses thereof as well as systems and methods for purifying helium gas3 Oct 2024US 2024/0327574 A1Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
- Solvent-resistant self-crosslinked poly(ether imide)s18 Jul 2024US 2024/0239977 A1Virginia Tech Intellectual Properties, Inc.
Most cited
By later US patents
- Composite solid polymer electrolyte membranes346US 7,550,216 B2Foster-Miller, Inc. · 2009
- Composite solid polymer electrolyte membranes158US 6,248,469 B1Foster-Miller, Inc. · 2001
- Novel multicomponent fluid separation membranes140US 5,085,676 AE. I. Du Pont de Nemours and Company · 1992
- Gas separation using C3+ hydrocarbon-resistant membranes102US 6,361,582 B1Membrane Technology and Research, Inc. · 2002
- Process for separation of the constituents of a mixture in the gas phase using a composite membrane70US 4,925,459 AInstitut Francais du Petrole · 1990