B01D 46/2411
Filter cartridges
Official title: {Filter cartridges}
B01D46/2411 (Filter cartridges) appears on 1,978 US grants and 1,902 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,978
- Published applications
- 1,902
- Assignees
- 671
- Inventors
- 3,032
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 8 | 0 |
| 1978 | 8 | 0 |
| 1979 | 15 | 0 |
| 1980 | 16 | 0 |
| 1981 | 25 | 0 |
| 1982 | 17 | 0 |
| 1983 | 5 | 0 |
| 1984 | 18 | 0 |
| 1985 | 14 | 0 |
| 1986 | 17 | 0 |
| 1987 | 17 | 0 |
| 1988 | 15 | 0 |
| 1989 | 16 | 0 |
| 1990 | 9 | 0 |
| 1991 | 9 | 0 |
| 1992 | 20 | 0 |
| 1993 | 20 | 0 |
| 1994 | 12 | 0 |
| 1995 | 17 | 0 |
| 1996 | 23 | 0 |
| 1997 | 37 | 0 |
| 1998 | 36 | 0 |
| 1999 | 45 | 0 |
| 2000 | 39 | 0 |
| 2001 | 37 | 12 |
| 2002 | 53 | 45 |
| 2003 | 47 | 45 |
| 2004 | 32 | 62 |
| 2005 | 37 | 50 |
| 2006 | 38 | 50 |
| 2007 | 29 | 53 |
| 2008 | 36 | 46 |
| 2009 | 26 | 57 |
| 2010 | 26 | 63 |
| 2011 | 40 | 53 |
| 2012 | 64 | 78 |
| 2013 | 64 | 72 |
| 2014 | 64 | 92 |
| 2015 | 59 | 89 |
| 2016 | 73 | 101 |
| 2017 | 68 | 87 |
| 2018 | 68 | 99 |
| 2019 | 87 | 97 |
| 2020 | 109 | 116 |
| 2021 | 76 | 124 |
| 2022 | 90 | 102 |
| 2023 | 79 | 102 |
| 2024 | 101 | 80 |
| 2025 | 76 | 72 |
| 2026 | 39 | 55 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Crankcase oil separation device for internal combustion engine6 Oct 2026US 12,752,229 B2Caterpillar Inc.
- Air filtration assembly6 Oct 2026US 12,752,230 B2Ufi Innovation Center S.R.L.
- Separating device with a separating element29 Sep 2026US 12,746,495 B2Mann+Hummel GmbH
- Filter system, filter mounting mechanism, and filter elements used in and with the filter system and filter mounting mechanism29 Sep 2026US 12,746,498 B2Altair (UK) Limited
- Filter element for a filter system having a resonator structure, and filter system having a resonator structure29 Sep 2026US 12,746,499 B2Mann+Hummel GmbH
- Filter assemblies and related filter elements8 Oct 2026US 2026/0306974 A1Donaldson Company, Inc.
- Add on auto clean assembly for a vacuum filtration system of a dry bulk trailer and method of using the same8 Oct 2026US 2026/0306984 A1Bulk Tank, Inc.
- Active precleaner system and methods of use24 Sep 2026US 2026/0284565 A1Donaldson Company, Inc.
- Coalescing separator insert, coalescing separator, and process for manufacturing a coalescing separator insert17 Sep 2026US 2026/0273446 A1Mann+Hummel GmbH
- Filter elements, related filter assembly and filter package10 Sep 2026US 2026/0263981 A1Donaldson Company, Inc.
Most cited
By later US patents
- Filter material construction and method335US 5,672,399 ADonaldson Company, Inc. · 1997
- Reverse flow air filter arrangement and method292US 5,613,992 ADonaldson Company, Inc. · 1997
- Cylindrical air filter with lightweight housing and radially directed seal282US 4,720,292 ADonaldson Company, Inc. · 1988
- Air filter element with radial seal sealing gasket260US 5,484,466 ABaldwin Filters, Inc. · 1996
- Cylindrical air filter with radially directed seal258US 5,547,480 ADonaldson Company, Inc. · 1996