B01D 71/44
Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for
Official title: Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of groups B01D71/26-B01D71/42
B01D71/44 (Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, not provided for) appears on 323 US grants and 367 published applications in this corpus.
Search patents in B01D- Granted patents
- 323
- Published applications
- 367
- Assignees
- 240
- Inventors
- 980
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 1 |
| 2002 | 5 | 8 |
| 2003 | 7 | 2 |
| 2004 | 6 | 9 |
| 2005 | 2 | 5 |
| 2006 | 1 | 12 |
| 2007 | 3 | 9 |
| 2008 | 6 | 11 |
| 2009 | 7 | 9 |
| 2010 | 4 | 9 |
| 2011 | 7 | 16 |
| 2012 | 7 | 15 |
| 2013 | 11 | 9 |
| 2014 | 12 | 15 |
| 2015 | 11 | 17 |
| 2016 | 11 | 13 |
| 2017 | 16 | 17 |
| 2018 | 7 | 17 |
| 2019 | 11 | 22 |
| 2020 | 20 | 23 |
| 2021 | 15 | 23 |
| 2022 | 25 | 36 |
| 2023 | 16 | 14 |
| 2024 | 16 | 22 |
| 2025 | 19 | 17 |
| 2026 | 9 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Gas separation membrane, and preparation method therefor and use thereof25 Aug 2026US 12,714,972 B2Changshu 3F Zhonghao New Chemical Materials Co., Ltd.
- Device for cutting hollow fiber membranes30 Jun 2026US 12,667,811 B2Gambro Lundia AB
- High flux nanofiltration membrane2 Jun 2026US 12,643,075 B1King Fahd University of Petroleum and Minerals
- Imidazoles and imidazolium cations with exceptional alkaline stability21 Apr 2026US 12,606,666 B2Cornell University
- Guanidine-containing membranes and methods of using thereof10 Mar 2026US 12,569,802 B2Ohio State Innovation Foundation
- Porous membrane and purification method8 Oct 2026US 2026/0307015 A1Toyobo Co., Ltd.
- Hollow fiber membranes comprising a poly(aryl ether sulfone) and a water-soluble polymer additive1 Oct 2026US 2026/0295540 A1BASF SE
- Separation functional layer and separation membrane10 Sep 2026US 2026/0264001 A1Nitto Denko Corporation
- Hollow fiber membrane, method for manufacturing hollow fiber membrane, and hollow fiber membrane module6 Aug 2026US 2026/0225043 A1Toray Industries, Inc.
- Composite semipermeable membrane, composite semipermeable membrane module, fluid separation device, and method for producing composite semipermeable membrane6 Aug 2026US 2026/0225045 A1Toray Industries, Inc.
Most cited
By later US patents
- Preparation of crosslinked matrices containing covalently immobilized chemical species and unbound releasable chemical species253US 5,563,056 ABSI Corporation · 1996
- Perfluorodioxole membranes135US 5,051,114 ADu Pont Canada Inc. · 1991
- Porous membranes124US 6,395,325 B1SciMed Life Systems, Inc. · 2002
- Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups123US 4,704,324 AThe Dow Chemical Company · 1987
- Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups105US 4,797,187 AThe Dow Chemical Company · 1989