B01D 46/42
Auxiliary equipment or operation thereof
B01D46/42 (Auxiliary equipment or operation thereof) appears on 2,915 US grants and 3,028 published applications in this corpus.
Search patents in B01D- Granted patents
- 2,915
- Published applications
- 3,028
- Assignees
- 1,441
- Inventors
- 6,407
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 17 | 0 |
| 1978 | 15 | 0 |
| 1979 | 14 | 0 |
| 1980 | 25 | 0 |
| 1981 | 30 | 0 |
| 1982 | 15 | 0 |
| 1983 | 10 | 0 |
| 1984 | 19 | 0 |
| 1985 | 23 | 0 |
| 1986 | 20 | 0 |
| 1987 | 28 | 0 |
| 1988 | 31 | 0 |
| 1989 | 25 | 0 |
| 1990 | 14 | 0 |
| 1991 | 12 | 0 |
| 1992 | 17 | 0 |
| 1993 | 26 | 0 |
| 1994 | 29 | 0 |
| 1995 | 44 | 0 |
| 1996 | 30 | 0 |
| 1997 | 32 | 0 |
| 1998 | 36 | 0 |
| 1999 | 29 | 0 |
| 2000 | 47 | 0 |
| 2001 | 56 | 12 |
| 2002 | 49 | 44 |
| 2003 | 48 | 53 |
| 2004 | 49 | 74 |
| 2005 | 42 | 67 |
| 2006 | 49 | 61 |
| 2007 | 41 | 77 |
| 2008 | 44 | 71 |
| 2009 | 47 | 83 |
| 2010 | 39 | 106 |
| 2011 | 76 | 92 |
| 2012 | 80 | 74 |
| 2013 | 76 | 91 |
| 2014 | 73 | 93 |
| 2015 | 70 | 100 |
| 2016 | 77 | 114 |
| 2017 | 99 | 171 |
| 2018 | 101 | 140 |
| 2019 | 116 | 158 |
| 2020 | 154 | 216 |
| 2021 | 148 | 255 |
| 2022 | 171 | 251 |
| 2023 | 176 | 218 |
| 2024 | 167 | 166 |
| 2025 | 163 | 130 |
| 2026 | 101 | 111 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 46/44Controlling filtration1,168
- B01D 46/4227Manipulating filters or filter elements490
- B01D 46/4272Special valve constructions adapted to filters or filter elements287
- B01D 46/48Removing dust other than cleaning filters232
- B01D 46/4263Means for active heating or cooling211
- B01D 46/429Means for wireless communication158
- B01D 46/4236Reducing noise or vibration emissions123
- B01D 46/4281Venturi's or systems showing a venturi effect121
All 13 subgroupsShow fewer
Recent patents
- Air filtration apparatus and system for providing patient information6 Oct 2026US 12,752,071 B2ResMed Pty Ltd
- Filter system comprising filter housing, replaceable filter element, and resonator structure6 Oct 2026US 12,752,227 B2Mann+Hummel GmbH
- Haircare appliance29 Sep 2026US 12,746,492 B2Dyson Technology Limited
- Indoor unit for air conditioner29 Sep 2026US 12,746,496 B2LG Electronics Inc.
- Indoor unit for air conditioner29 Sep 2026US 12,746,497 B2LG Electronics Inc.
- Stackable air treatment device8 Oct 2026US 2026/0306982 A1Carrier Corporation
- Fluid delivery module8 Oct 2026US 2026/0314292 A1Ichor Systems, Inc.
- Dust removal filler, fouling collection pan and gas cleaning device1 Oct 2026US 2026/0295489 A1China Petroleum & Chemical Corporation
- Air filtration assembly with airflow feedback1 Oct 2026US 2026/0295492 A1Apex Brands, Inc.
- Air filtration system with main and subsidiary assemblies1 Oct 2026US 2026/0295493 A1Apex Brands, Inc.
Most cited
By later US patents
- Filter element incorporating a handle member390US 6,235,195 B1Donaldson Company, Inc. · 2001
- Air filtration system with filter efficiency management373US 6,391,102 B1Stackhouse, Inc. · 2002
- Dual mode laser smoke evacuation system with sequential filter monitor and vacuum compensation360US 5,242,474 ASorenson Laboratories, Inc. · 1993
- 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