B01D 2239/1225
Fibre length
B01D2239/1225 (Fibre length) appears on 161 US grants and 209 published applications in this corpus.
Search patents in B01D- Granted patents
- 161
- Published applications
- 209
- Assignees
- 139
- Inventors
- 488
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 3 |
| 2004 | 2 | 1 |
| 2005 | 1 | 2 |
| 2006 | 1 | 2 |
| 2007 | 1 | 6 |
| 2008 | 1 | 1 |
| 2009 | 4 | 5 |
| 2010 | 0 | 4 |
| 2011 | 2 | 6 |
| 2012 | 3 | 5 |
| 2013 | 3 | 8 |
| 2014 | 4 | 5 |
| 2015 | 6 | 7 |
| 2016 | 4 | 9 |
| 2017 | 1 | 11 |
| 2018 | 8 | 12 |
| 2019 | 10 | 11 |
| 2020 | 8 | 11 |
| 2021 | 11 | 22 |
| 2022 | 13 | 22 |
| 2023 | 6 | 20 |
| 2024 | 11 | 18 |
| 2025 | 12 | 9 |
| 2026 | 10 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High efficiency synthetic filter media1 Sep 2026US 12,722,107 B2Knowlton Technologies, LLC
- Biodegradable composite filter media for air filters and manufacturing method thereof16 Jun 2026US 12,654,118 B2Nam Yang Non-Woven Fabric Co., Ltd.
- High temperature treated media9 Jun 2026US 12,649,982 B2Donaldson Company, Inc.
- Non-passive anti-viral and nanofilter based respirators2 Jun 2026US 12,643,063 B1University of Louisville Research Foundation, Inc.
- Filter media, composites, and face mask systems using same26 May 2026US 12,636,524 B2Donaldson Company, Inc.
- Filter6 Aug 2026US 2026/0225013 A1Seiko Epson Corporation
- Preparation Method for Antimicrobial Air Filtration Material23 Apr 2026US 2026/0108832 A1
- Dual-layer gas filters and systems and methods for making the same9 Apr 2026US 2026/0097341 A1DelStar Technologies, Inc.
- Non-woven mat9 Apr 2026US 2026/0098362 A1
- Apertured polymer sheets incorporating nanoparticles2 Apr 2026US 2026/0092156 A1DelStar Technologies, Inc.
Most cited
By later US patents
- Blood filter and method of filtration941US 5,190,657 ALydall, Inc. · 1993
- Oily mist resistant electret filter media and method for filtering148US 5,411,576 AMinnesota Mining and Manufacturing Company · 1995
- Oily mist resistant electret filter media130US 5,472,481 AMinnesota Mining and Manufacturing Company · 1995
- Blended-fibre filter material109US 4,798,850 ANational Research Development Corporation · 1989
- Nanofiber packed beds having enhanced fluid flow characteristics88US 5,800,706 AHyperion Catalysis International, Inc. · 1998