B01D 46/30
Particle separators
Official title: Particle separators, e.g. dust precipitators, using loose filtering material
B01D46/30 (Particle separators) appears on 334 US grants and 163 published applications in this corpus.
Search patents in B01D- Granted patents
- 334
- Published applications
- 163
- Assignees
- 236
- Inventors
- 663
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 11 | 0 |
| 1978 | 7 | 0 |
| 1979 | 13 | 0 |
| 1980 | 11 | 0 |
| 1981 | 18 | 0 |
| 1982 | 11 | 0 |
| 1983 | 5 | 0 |
| 1984 | 10 | 0 |
| 1985 | 7 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 11 | 0 |
| 1990 | 9 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 8 | 0 |
| 1999 | 9 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 7 |
| 2003 | 4 | 6 |
| 2004 | 6 | 4 |
| 2005 | 0 | 5 |
| 2006 | 7 | 6 |
| 2007 | 4 | 5 |
| 2008 | 2 | 10 |
| 2009 | 4 | 5 |
| 2010 | 9 | 7 |
| 2011 | 6 | 5 |
| 2012 | 6 | 7 |
| 2013 | 3 | 4 |
| 2014 | 4 | 10 |
| 2015 | 12 | 12 |
| 2016 | 6 | 8 |
| 2017 | 13 | 4 |
| 2018 | 4 | 8 |
| 2019 | 8 | 4 |
| 2020 | 5 | 5 |
| 2021 | 4 | 5 |
| 2022 | 4 | 9 |
| 2023 | 4 | 4 |
| 2024 | 3 | 13 |
| 2025 | 5 | 5 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air filtration cassette, an air filter and a filter arrangement24 Feb 2026US 12,558,646 B2Camfil Aktiebolag
- Air filter and air purifier comprising same17 Feb 2026US 12,551,836 B2Coway Co., Ltd.
- Filter for respirator mask or other filtering applications7 Oct 2025US 12,434,081 B2Airboss Engineered Products Inc.
- Filtering device, generator and wind turbine generator system8 Jul 2025US 12,350,614 B2Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd.
- Adsorptive separation apparatus8 Jul 2025US 12,350,620 B2Shenzhen Biteman Technology Co., Ltd.
- Hybrid filter unit8 Oct 2026US 2026/0307082 A1Brairtech Sweden AB
- Vacuum cleaner filter bag and method for preparing the vacuum cleaner filter bag11 Jun 2026US 2026/0158426 A1Essilor International
- Externally preloaded adsorber cartridge and adsorber module16 Apr 2026US 2026/0102730 A1Mann+Hummel GmbH
- Air compressor filter5 Feb 2026US 2026/0034494 A1Zhejiang Nan Pu Pneumatic Component Co., Ltd.
- Moisture centrifuge dryer8 Jan 2026US 2026/0007991 A1MDX Co., Ltd.
Most cited
By later US patents
- Lightweight filter106US 4,838,901 ALife Systems, Inc. · 1989
- High temperature nanofilter, system and method99US 7,052,532 B13M Innovative Properties Company · 2006
- Fibrous filtration face mask having corrugated polymeric microfiber filter layer86US 5,656,368 AMinnesota Mining and Manufacturing Company · 1997
- Device for continuous contacting of fluids and solids77US 4,764,276 AAdvanced Separation Technologies Incorporated · 1988
- Four-sided air filter75US 4,749,390 AAir Purification Products, International · 1988