B01D 71/641
Polyamide-imides
Official title: {Polyamide-imides}
B01D71/641 (Polyamide-imides) appears on 104 US grants and 113 published applications in this corpus.
Search patents in B01D- Granted patents
- 104
- Published applications
- 113
- Assignees
- 69
- Inventors
- 290
- Latest grant
- 21 Jul 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 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 2 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 5 |
| 2011 | 0 | 3 |
| 2012 | 1 | 4 |
| 2013 | 2 | 1 |
| 2014 | 1 | 3 |
| 2015 | 3 | 14 |
| 2016 | 1 | 14 |
| 2017 | 10 | 9 |
| 2018 | 10 | 10 |
| 2019 | 8 | 7 |
| 2020 | 9 | 9 |
| 2021 | 5 | 8 |
| 2022 | 5 | 4 |
| 2023 | 3 | 3 |
| 2024 | 4 | 5 |
| 2025 | 4 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hollow fiber and a process for preparation thereof21 Jul 2026US 12,685,972 B2E. & J. Gallo Winery
- Filtering device, purification device, and method for manufacturing chemical liquid16 Jun 2026US 12,654,136 B2FUJIFILM Corporation
- Composite hollow fiber and related methods and products9 Sep 2025US 12,409,422 B2Entegris, Inc.
- Ammonia stripping device, and resource recovery type high concentration wastewater treatment system using the same5 Aug 2025US 12,378,137 B2Korea Conformity Laboratories
- Hydrophobic organic-inorganic composite hollow fiber membrane and method of forming the same29 Jul 2025US 12,370,504 B2Nanyang Technological University
- Hollow fiber and a process for preparation thereof10 Sep 2026US 2026/0264024 A1
- Dual-layer hollow fibre membrane27 Aug 2026US 2026/0249249 A1Divigas Pet Ltd
- Nano-membrane, electronic device including the same, and method for manufacturing the nano-membrane23 Jul 2026US 2026/0209030 A1Kolon Industries, Inc.
- Fiber reinforcement for ion exchange composite membrane6 Nov 2025US 2025/0339851 A1Solvay Specialty Polymers Italy S.P.A.
- Ammonia stripping device, and resource recovery type high concentration wastewater treatment system using the same19 Jun 2025US 2025/0197249 A1Korea Conformity Laboratories
Most cited
By later US patents
- Novel multicomponent fluid separation membranes140US 5,085,676 AE. I. Du Pont de Nemours and Company · 1992
- Gas separations utilizing glassy polymer membranes at sub-ambient temperatures80US 5,837,032 AThe Cynara Company · 1998
- 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
- Aromatic polyimide composite separating membrane63US 4,528,004 AUbe Industries, Ltd. · 1985
- Filtration membranes and method of making the same57US 4,900,449 AGelman Sciences, Inc. · 1990