B01D 39/02
Loose filtering material
Official title: Loose filtering material, e.g. loose fibres
B01D39/02 (Loose filtering material) appears on 505 US grants and 612 published applications in this corpus.
Search patents in B01D- Granted patents
- 505
- Published applications
- 612
- Assignees
- 419
- Inventors
- 1,322
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 8 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 8 | 0 |
| 1981 | 5 | 0 |
| 1982 | 9 | 0 |
| 1983 | 5 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 7 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 9 | 0 |
| 1998 | 11 | 0 |
| 1999 | 10 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 22 |
| 2003 | 6 | 16 |
| 2004 | 13 | 27 |
| 2005 | 11 | 13 |
| 2006 | 10 | 10 |
| 2007 | 6 | 14 |
| 2008 | 10 | 22 |
| 2009 | 9 | 22 |
| 2010 | 10 | 22 |
| 2011 | 10 | 23 |
| 2012 | 16 | 25 |
| 2013 | 15 | 22 |
| 2014 | 10 | 17 |
| 2015 | 11 | 17 |
| 2016 | 13 | 27 |
| 2017 | 13 | 19 |
| 2018 | 8 | 26 |
| 2019 | 20 | 40 |
| 2020 | 27 | 44 |
| 2021 | 30 | 39 |
| 2022 | 28 | 48 |
| 2023 | 26 | 29 |
| 2024 | 17 | 36 |
| 2025 | 22 | 24 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Minimum packaging volume structure and packaging method for dual-tank pet water dispenser29 Sep 2026US 12,747,080 B1Shenzhen Qianhai Runway Technology Co., LTD.
- Formulations and processes for treating water from impacted sources25 Aug 2026US 12,714,991 B2Brown University
- Method and system for producing refined hydrocarbons from waste plastics23 Jun 2026US 12,662,638 B2SK Innovation Co., Ltd.
- Lightweight fibrous media (LFM) filter31 Mar 2026US 12,589,336 B1
- Filtration device and water filtration pitcher comprising the same13 Jan 2026US 12,521,650 B2King's Flair Innovative Marketing Limited
- Purification of capsular polysaccharides13 Aug 2026US 2026/0234293 A1Vaxcyte, Inc.
- Cartridge and method for cleaning water lines of an appliance25 Jun 2026US 2026/0176167 A1Electrolux Home Products, Inc.
- Vacuum cleaner filter bag and method for preparing the vacuum cleaner filter bag11 Jun 2026US 2026/0158426 A1Essilor International
- Biochar materials for abatement of pollutants4 Jun 2026US 2026/0151717 A1AbTech Industries, Inc.
- Filtration system14 May 2026US 2026/0131263 A2The Pennington School
Most cited
By later US patents
- Polymer, polymer microfiber, polymer nanofiber and applications including filter structures252US 6,743,273 B2Donaldson Company, Inc. · 2004
- Device and method for depletion of the leukocyte content of blood and blood components203US 4,925,572 APall Corporation · 1990
- Ceramic spheroids having low density and high crush resistance139US 4,632,876 AMinnesota Mining and Manufacturing Company · 1986
- Process if making fine fiber material131US 6,955,775 B2Donaldson Company, Inc. · 2005
- Polymer, polymer microfiber, polymer nanofiber and applications including filter structures120US 6,924,028 B2Donaldson Company, Inc. · 2005