B01D 46/52
Particle separators
Official title: Particle separators, e.g. dust precipitators, using filters embodying folded {corrugated or wound sheet} material
B01D46/52 (Particle separators) appears on 2,917 US grants and 3,003 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,917
- Published applications
- 3,003
- Assignees
- 918
- Inventors
- 4,566
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 8 | 0 |
| 1980 | 21 | 0 |
| 1981 | 19 | 0 |
| 1982 | 18 | 0 |
| 1983 | 11 | 0 |
| 1984 | 17 | 0 |
| 1985 | 15 | 0 |
| 1986 | 24 | 0 |
| 1987 | 31 | 0 |
| 1988 | 22 | 0 |
| 1989 | 21 | 0 |
| 1990 | 13 | 0 |
| 1991 | 14 | 0 |
| 1992 | 19 | 0 |
| 1993 | 21 | 0 |
| 1994 | 18 | 0 |
| 1995 | 23 | 0 |
| 1996 | 34 | 0 |
| 1997 | 44 | 0 |
| 1998 | 58 | 0 |
| 1999 | 54 | 0 |
| 2000 | 64 | 0 |
| 2001 | 64 | 21 |
| 2002 | 66 | 72 |
| 2003 | 56 | 75 |
| 2004 | 63 | 89 |
| 2005 | 57 | 82 |
| 2006 | 54 | 81 |
| 2007 | 53 | 89 |
| 2008 | 46 | 116 |
| 2009 | 49 | 100 |
| 2010 | 59 | 110 |
| 2011 | 110 | 106 |
| 2012 | 105 | 118 |
| 2013 | 107 | 103 |
| 2014 | 96 | 139 |
| 2015 | 82 | 121 |
| 2016 | 104 | 117 |
| 2017 | 93 | 164 |
| 2018 | 85 | 147 |
| 2019 | 163 | 135 |
| 2020 | 143 | 172 |
| 2021 | 123 | 177 |
| 2022 | 123 | 174 |
| 2023 | 120 | 147 |
| 2024 | 130 | 140 |
| 2025 | 109 | 123 |
| 2026 | 70 | 85 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter system comprising filter housing, replaceable filter element, and resonator structure6 Oct 2026US 12,752,227 B2Mann+Hummel GmbH
- Filter systems for room air conditioners29 Sep 2026US 12,746,494 B2Rheem Manufacturing Company
- Filter media, filter media packs, and filter elements29 Sep 2026US 12,746,500 B2Donaldson Company, Inc.
- Filtration assembly and system29 Sep 2026US RE51,044 E1Walk Industrial, Inc.
- Polyethersulfone fiber webs22 Sep 2026US 12,741,243 B2Hollingsworth & Vose Company
- Automotive air filters with hydrocarbon-absorbing media8 Oct 2026US 2026/0306983 A1
- Embedded pleat face stabilizing structure for deep pleated embossed heavy duty panel air media packs and/or end cap catch feature8 Oct 2026US 2026/0306985 A1Baldwin Filters, Inc.
- Filter element for use with dust collector & other applications8 Oct 2026US 2026/0306986 A1Donaldson Company, Inc.
- Air Filter8 Oct 2026US 2026/0309346 A1Zhongshan Scott Clean&Purification Co., Ltd.
- Active precleaner system and methods of use24 Sep 2026US 2026/0284565 A1Donaldson Company, Inc.
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
- Filter element incorporating a handle member390US 6,235,195 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