A61L 2209/131
Semi-permeable membranes
A61L2209/131 (Semi-permeable membranes) appears on 135 US grants and 213 published applications in this corpus.
Search patents in A61L- Granted patents
- 135
- Published applications
- 213
- Assignees
- 59
- Inventors
- 296
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 8 |
| 2011 | 1 | 6 |
| 2012 | 3 | 4 |
| 2013 | 3 | 3 |
| 2014 | 8 | 18 |
| 2015 | 5 | 9 |
| 2016 | 18 | 6 |
| 2017 | 4 | 20 |
| 2018 | 8 | 21 |
| 2019 | 9 | 15 |
| 2020 | 12 | 22 |
| 2021 | 7 | 11 |
| 2022 | 12 | 11 |
| 2023 | 11 | 15 |
| 2024 | 13 | 16 |
| 2025 | 3 | 14 |
| 2026 | 14 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Volatile composition dispenser with cartridge for multiple volatile compositions6 Oct 2026US 12,752,031 B2The Procter & Gamble Company
- Preparation method of bismuth ion filter membrane and application thereof15 Sep 2026US 12,734,470 B2Work Together Marketing Consultant Limited
- Refillable volatile composition dispenser18 Aug 2026US 12,708,691 B2The Procter & Gamble Company
- Volatile composition dispenser with improved scent intensity control18 Aug 2026US 12,708,692 B2The Procter & Gamble Company
- Compositions and methods for eliminating scent12 May 2026US 12,623,202 B1Camo Dust Inc.
- Device for diffusing volatile substances and method for manufacturing said device8 Oct 2026US 2026/0306692 A1Zobele Holding SPA
- Disinfecting apparatus1 Oct 2026US 2026/0295108 A1Specialist Health Solutions Limited
- System and method for air decontamination24 Sep 2026US 2026/0284251 A1
- Method and apparatus for burst dispersion of multiple distinct odors27 Aug 2026US 2026/0249037 A1
- Device and method for capturing and/or neutralizing pathogens in air6 Aug 2026US 2026/0224769 A1Ohio University
Most cited
By later US patents
- Vapor dispenser and method of making same74US 4,356,969 AMoleculon Research Corporation · 1982
- Apparatus for delivering a volatile material61US 8,740,110 B2The Procter & Gamble Company · 2014
- Air freshening and deodorizing system60US 5,782,409 A1998
- Volatile material dispenser and method of emitting a volatile material58US 9,278,365 B2S. C. Johnson & Son, Inc. · 2016
- Apparatus for delivering a volatile material44US 8,931,711 B2The Procter & Gamble Company · 2015