B01D 71/22
Cellulose ethers
B01D71/22 (Cellulose ethers) appears on 42 US grants and 28 published applications in this corpus.
Search patents in B01D- Granted patents
- 42
- Published applications
- 28
- Assignees
- 36
- Inventors
- 108
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 2 | 4 |
| 2016 | 3 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 3 |
| 2021 | 1 | 5 |
| 2022 | 1 | 1 |
| 2023 | 2 | 1 |
| 2024 | 3 | 0 |
| 2025 | 2 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fluid separation membranes and use thereof7 Jul 2026US 12,673,298 B1Semicom Dwc-LLC
- Mechanically stable ultrafiltration membrane, and method for producing same3 Jun 2025US 12,318,734 B2Sartorius Stedim Biotech GmbH
- Hydrophilic porous membrane and method for producing hydrophilic porous membrane1 Apr 2025US 12,263,451 B2FUJIFILM Corporation
- Membrane-based processing for ambient water-group species captured on the moon and in space19 Nov 2024US 12,145,099 B2
- Hydrophilic porous membrane and method for producing hydrophilic porous membrane11 Jun 2024US 12,005,401 B2FUJIFILM Corporation
- Thermal treatment of ultrafiltration membranes10 Sep 2026US 2026/0264023 A1Sartorius Stedim Biotech GmbH
- Mechanically stable ultrafiltration membrane, and method for producing same28 May 2026US 2026/0145140 A1Sartorius Stedim Biotech GmbH
- Filtration system18 Sep 2025US 2025/0288960 A1Ora Graphene Audio Inc.
- Membrane-based processing for ambient water-group species captured on the Moon and in space6 Mar 2025US 2025/0073636 A1
- Separation membrane and method for producing separation membrane23 Feb 2023US 2023/0053706 A1Toray Industries, Inc.
Most cited
By later US patents
- Polymeric system for drug delivery and solute separation94US 6,565,872 B22003
- Blood compatible polymers for blood oxygenation devices47US 4,008,047 ANorth Star Research Institute · 1977
- Ultrathin ethylcellulose/poly(4-methylpentene-1) permselective membranes24US 4,871,378 AMembrane Technology and Research, Inc. · 1989
- Dialysis membrane of modified cellulose with improved biocompatibility19US 4,668,396 AAkzo N. V. · 1987
- Process for the separation of olefins from paraffins using membranes19US 7,361,800 B2Monteco Ltd. · 2008