B01D 71/54
Polyureas
Official title: Polyureas; Polyurethanes
B01D71/54 (Polyureas) appears on 175 US grants and 179 published applications in this corpus.
Search patents in B01D- Granted patents
- 175
- Published applications
- 179
- Assignees
- 146
- Inventors
- 544
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 8 | 0 |
| 1989 | 6 | 0 |
| 1990 | 8 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 3 |
| 2004 | 2 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 5 |
| 2007 | 1 | 1 |
| 2008 | 2 | 2 |
| 2009 | 1 | 3 |
| 2010 | 0 | 6 |
| 2011 | 2 | 7 |
| 2012 | 3 | 7 |
| 2013 | 3 | 12 |
| 2014 | 2 | 8 |
| 2015 | 11 | 8 |
| 2016 | 10 | 11 |
| 2017 | 6 | 4 |
| 2018 | 5 | 12 |
| 2019 | 1 | 13 |
| 2020 | 7 | 16 |
| 2021 | 12 | 16 |
| 2022 | 8 | 8 |
| 2023 | 10 | 7 |
| 2024 | 2 | 11 |
| 2025 | 8 | 9 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydrophilic membrane separation layer31 Mar 2026US 12,589,360 B2Nitto Denko Corporation
- Nanomembrane and forming method thereof10 Mar 2026US 12,569,815 B2Institute for Basic Science
- Preparation method for high-moisture- permeability fluorine-containing super- oleophobic microporous membrane3 Mar 2026US 12,564,818 B2Shanghai Hyproof New Material Technology Co., Ltd
- Compositions and methods for improved calibration accuracy of creatinine/creatine sensors and uses thereof20 Jan 2026US 12,529,673 B2Instrumentation Laboratory Company
- System for separating oil and water mixture using hydrophilic modified polystyrene and hydrophobic polyurethane2 Dec 2025US 12,485,365 B2King Fahd University of Petroleum and Minerals
- Acid-resistant and alkali-resistant composite nanofiltration membrane, and preparation method therefor and use thereof17 Sep 2026US 2026/0273478 A1China Petroleum & Chemical Corporation
- Synthetic channels20 Aug 2026US 2026/0241346 A1Centre National de la Recherche Scientifique (CNRS)
- Compositions for preparing membranes from polymer solutions23 Jul 2026US 2026/0208118 A1The Lubrizol Corporation
- Conductive flame retardant and breathable membrane16 Jul 2026US 2026/0199844 A1UC Bacon Company Limited
- Biosensor, outer membrane of biosensor, methods of preparation and use thereof2 Jul 2026US 2026/0182867 A1Shanghai Microport Lifesciences Co., Ltd.
Most cited
By later US patents
- Techniques to improve polyurethane membranes for implantable glucose sensors1,046US 7,226,978 B2DexCom, Inc. · 2007
- Surface-modifying endgroups for biomedical polymers517US 5,589,563 AThe Polymer Technology Group · 1996
- Membranes of polyurethane based materials including polyester polyols364US 6,321,465 B1NIKE, Inc. · 2001
- Systems for premeating molecules of predetermined molecular weight range361US 5,756,632 AThe Polymer Technology Group · 1998
- Hydrophilic or hydrogel carrier systems such as coatings, body implants and other articles353US 3,975,350 APrinceton Polymer Laboratories, Incorporated · 1976