B01D 46/56
Filters or filtering processes specially modified for separating dispersed particles from gases
Official title: with multiple filtering elements, characterised by their mutual disposition (B01D46/12 takes precedence)
B01D46/56 (Filters or filtering processes specially modified for separating dispersed particles from gases) appears on 2,163 US grants and 2,361 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,163
- Published applications
- 2,361
- Assignees
- 1,038
- Inventors
- 4,566
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 8 | 0 |
| 1981 | 16 | 0 |
| 1982 | 10 | 0 |
| 1983 | 8 | 0 |
| 1984 | 5 | 0 |
| 1985 | 14 | 0 |
| 1986 | 9 | 0 |
| 1987 | 16 | 0 |
| 1988 | 15 | 0 |
| 1989 | 21 | 0 |
| 1990 | 12 | 0 |
| 1991 | 10 | 0 |
| 1992 | 17 | 0 |
| 1993 | 24 | 0 |
| 1994 | 23 | 0 |
| 1995 | 36 | 0 |
| 1996 | 23 | 0 |
| 1997 | 24 | 0 |
| 1998 | 50 | 0 |
| 1999 | 24 | 0 |
| 2000 | 33 | 0 |
| 2001 | 38 | 9 |
| 2002 | 37 | 29 |
| 2003 | 32 | 28 |
| 2004 | 24 | 45 |
| 2005 | 31 | 47 |
| 2006 | 26 | 55 |
| 2007 | 25 | 55 |
| 2008 | 32 | 42 |
| 2009 | 31 | 70 |
| 2010 | 28 | 65 |
| 2011 | 46 | 55 |
| 2012 | 60 | 81 |
| 2013 | 52 | 63 |
| 2014 | 71 | 97 |
| 2015 | 56 | 146 |
| 2016 | 86 | 129 |
| 2017 | 110 | 156 |
| 2018 | 96 | 99 |
| 2019 | 116 | 122 |
| 2020 | 121 | 144 |
| 2021 | 101 | 198 |
| 2022 | 115 | 158 |
| 2023 | 116 | 156 |
| 2024 | 129 | 123 |
| 2025 | 111 | 103 |
| 2026 | 53 | 86 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air filtration assembly6 Oct 2026US 12,752,230 B2Ufi Innovation Center S.R.L.
- Haircare appliance29 Sep 2026US 12,746,492 B2Dyson Technology Limited
- Filter unit29 Sep 2026US 12,746,493 B2Samsung Biologics Co., Ltd.
- Filter media, filter media packs, and filter elements29 Sep 2026US 12,746,500 B2Donaldson Company, Inc.
- Air conditioning and filtration system29 Sep 2026US 12,746,502 B2Work Air Technologies Pty Ltd
- Stackable air treatment device8 Oct 2026US 2026/0306982 A1Carrier Corporation
- Systems, Methods, and Apparatuses for Producing and Packaging Medical Fluids8 Oct 2026US 2026/0307835 A1
- Sterilizing Cabinet Filter Assembly1 Oct 2026US 2026/0295487 A1
- Separator for a fluid cleaning device24 Sep 2026US 2026/0284678 A1Dyson Technology Limited
- Coalescing separator insert, coalescing separator, and process for manufacturing a coalescing separator insert17 Sep 2026US 2026/0273445 A1Mann+Hummel GmbH
Most cited
By later US patents
- Inline filter apparatus526US 5,820,646 ADonaldson Company, Inc. · 1998
- Filter arrangement; sealing system; and methods402US 6,190,432 B1Donaldson Company, Inc. · 2001
- Air filtration arrangements having fluted media constructions and methods381US 6,673,136 B2Donaldson Company, Inc. · 2004
- Air filter arrangement having first and second filter media dividing a housing and methods343US 6,210,469 B1Donaldson Company, Inc. · 2001
- Air cleaner having sealing arrangement between media arrangement and housing342US 6,179,890 B2Donaldson Company, Inc. · 2001