B01D 71/401
Polymers based on the polymerisation of acrylic acid
Official title: {Polymers based on the polymerisation of acrylic acid, e.g. polyacrylate}
B01D71/401 (Polymers based on the polymerisation of acrylic acid) appears on 294 US grants and 374 published applications in this corpus.
Search patents in B01D- Granted patents
- 294
- Published applications
- 374
- Assignees
- 236
- Inventors
- 1,010
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 7 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 5 |
| 2003 | 3 | 5 |
| 2004 | 5 | 10 |
| 2005 | 4 | 9 |
| 2006 | 4 | 15 |
| 2007 | 2 | 10 |
| 2008 | 8 | 11 |
| 2009 | 6 | 12 |
| 2010 | 6 | 14 |
| 2011 | 13 | 9 |
| 2012 | 11 | 7 |
| 2013 | 9 | 8 |
| 2014 | 6 | 8 |
| 2015 | 4 | 14 |
| 2016 | 9 | 20 |
| 2017 | 13 | 18 |
| 2018 | 14 | 21 |
| 2019 | 16 | 26 |
| 2020 | 16 | 28 |
| 2021 | 17 | 28 |
| 2022 | 11 | 24 |
| 2023 | 18 | 17 |
| 2024 | 10 | 22 |
| 2025 | 15 | 23 |
| 2026 | 4 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Acid resistant filter media7 Apr 2026US 12,595,396 B2Entegris, Inc.
- Electrostatically charged porous nonwoven web, membrane and mask derived therefrom and methods for manufacture and cleaning31 Mar 2026US 12,589,364 B2Arkema France
- Preparation method for high-moisture- permeability fluorine-containing super- oleophobic microporous membrane3 Mar 2026US 12,564,818 B2Shanghai Hyproof New Material Technology Co., Ltd
- Membranes and their uses6 Jan 2026US 12,515,213 B2FUJIFILM Corporation
- Functional film and method for producing same25 Nov 2025US 12,479,005 B2Dai Nippon Printing Co.Ltd.
- Conductive forward osmosis membrane and preparation method thereof8 Oct 2026US 2026/0307018 A1Beijing Baoshengtong International Electrical Engineering Technology Co., Ltd.
- Hollow fiber membrane, method for manufacturing hollow fiber membrane, and hollow fiber membrane module6 Aug 2026US 2026/0225043 A1Toray Industries, Inc.
- Hollow fiber membrane and hollow fiber membrane module6 Aug 2026US 2026/0225044 A1Toray Industries, Inc.
- Method for making cross-linkable zwitterionic polymer membranes and their use23 Jul 2026US 2026/0208123 A1Trustees of Tufts College
- Amino acid analysis system and amino acid analysis method9 Jul 2026US 2026/0194497 A1National University Corporation Kumamoto University
Most cited
By later US patents
- Acrylic copolymer membranes for biosensors653US 5,284,140 AEli Lilly and Company · 1994
- Preparation of crosslinked matrices containing covalently immobilized chemical species and unbound releasable chemical species253US 5,563,056 ABSI Corporation · 1996
- Process for the manufacture of an ophthalmic molding244US 6,039,913 ANovartis AG · 2000
- Acrylic copolymer membranes for biosensors179US 5,476,094 AEli Lilly and Company · 1995
- Semi-permeable membranes prepared via reaction of cationic groups with nucleophilic groups123US 4,704,324 AThe Dow Chemical Company · 1987