B01D 71/4011
Polymethylmethacrylate
Official title: {Polymethylmethacrylate}
B01D71/4011 (Polymethylmethacrylate) appears on 96 US grants and 126 published applications in this corpus.
Search patents in B01D- Granted patents
- 96
- Published applications
- 126
- Assignees
- 107
- Inventors
- 380
- Latest grant
- 31 Mar 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 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 0 | 4 |
| 2004 | 1 | 2 |
| 2005 | 1 | 4 |
| 2006 | 1 | 5 |
| 2007 | 0 | 2 |
| 2008 | 2 | 1 |
| 2009 | 2 | 2 |
| 2010 | 1 | 4 |
| 2011 | 2 | 3 |
| 2012 | 3 | 4 |
| 2013 | 5 | 4 |
| 2014 | 2 | 4 |
| 2015 | 1 | 6 |
| 2016 | 4 | 3 |
| 2017 | 4 | 7 |
| 2018 | 5 | 6 |
| 2019 | 5 | 13 |
| 2020 | 4 | 15 |
| 2021 | 10 | 11 |
| 2022 | 4 | 5 |
| 2023 | 9 | 6 |
| 2024 | 3 | 5 |
| 2025 | 4 | 5 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrostatically charged porous nonwoven web, membrane and mask derived therefrom and methods for manufacture and cleaning31 Mar 2026US 12,589,364 B2Arkema France
- Polymer additive comprising zwitterionic moieties for vinylidene fluoridepolymer based membranes26 Aug 2025US 12,398,227 B2Syensqo SA
- Porous membrane15 Apr 2025US 12,274,985 B2Asahi Kasei Medical Co., Ltd.
- Fabrication of filtration membranes25 Feb 2025US 12,233,383 B2Trustees of Tufts College
- Non-woven fiber membranes7 Jan 2025US 12,186,713 B2Merck Millipore 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.
- Pervaporation membrane22 Jan 2026US 2026/0022036 A1Nitto Denko Corporation
- Triethylphosphate/n-methylpyrrolidone solvent blends for making pvdf membranes25 Dec 2025US 2025/0387757 A1Arkema Inc.
- Cross-linkable and charged zwitterionic polymers and membranes comprising same2 Oct 2025US 2025/0304734 A1Trustees of Tufts College
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
- Polymethyl methacrylate membrane59US 4,439,322 AToray Industries, Inc. · 1984
- Polymeric compositions and hydrogels formed therefrom40US 4,267,295 ASyntex (U.S.A.) Inc. · 1981
- Blended, polymeric, matrix membrane and process of making and using same35US 4,377,481 AAbcor, Inc. · 1983
- Hollow fiber and method of manufacturing the same33US 4,323,627 ANippon Zeon Co., Ltd. · 1982