B01D 71/60
Polyamines
B01D71/60 (Polyamines) appears on 146 US grants and 231 published applications in this corpus.
Search patents in B01D- Granted patents
- 146
- Published applications
- 231
- Assignees
- 190
- Inventors
- 654
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 2 | 4 |
| 2006 | 2 | 4 |
| 2007 | 3 | 2 |
| 2008 | 2 | 1 |
| 2009 | 1 | 6 |
| 2010 | 1 | 8 |
| 2011 | 3 | 1 |
| 2012 | 2 | 9 |
| 2013 | 4 | 8 |
| 2014 | 3 | 10 |
| 2015 | 5 | 10 |
| 2016 | 7 | 15 |
| 2017 | 8 | 6 |
| 2018 | 6 | 7 |
| 2019 | 10 | 16 |
| 2020 | 9 | 17 |
| 2021 | 12 | 13 |
| 2022 | 11 | 20 |
| 2023 | 10 | 12 |
| 2024 | 6 | 18 |
| 2025 | 9 | 20 |
| 2026 | 6 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hollow fiber and a process for preparation thereof21 Jul 2026US 12,685,972 B2E. & J. Gallo Winery
- Method for preparing porous aromatic framework membranes based on inorganic salt template method7 Jul 2026US 12,673,297 B2
- Polymers for use as anion exchange membranes5 May 2026US 12,617,889 B1Envision Energy USA Ltd.
- Guanidine-containing membranes and methods of using thereof10 Mar 2026US 12,569,802 B2Ohio State Innovation Foundation
- Compositions and polymer films27 Jan 2026US 12,534,583 B2FUJIFILM Corporation
- Conductive base membrane and preparation method thereof24 Sep 2026US 2026/0284606 A1Beijing Baoshengtong International Electrical Engineering Technology Co., Ltd.
- Acid-resistant and alkali-resistant composite nanofiltration membrane, and preparation method therefor and use thereof17 Sep 2026US 2026/0273478 A1China Petroleum & Chemical Corporation
- Hollow fiber and a process for preparation thereof10 Sep 2026US 2026/0264024 A1
- Hollow fiber membrane and hollow fiber membrane module6 Aug 2026US 2026/0225044 A1Toray Industries, Inc.
- Biosensor materials6 Aug 2026US 2026/0227395 A1The Regents of the University of California
Most cited
By later US patents
- Systems for premeating molecules of predetermined molecular weight range361US 5,756,632 AThe Polymer Technology Group · 1998
- Copolymers and non-porous, semi-permeable membrane thereof and its use for permeating molecules of predetermined molecular weight range303US 5,428,123 AThe Polymer Technology Group · 1995
- Process for preparation of improved semipermeable composite membranes112US 4,388,189 A1983
- Semipermeable composite membrane101US 4,302,336 ATeijin Limited · 1981
- Semipermeable composite membrane87US 4,353,802 ATeijin Limited · 1982