F02M 35/02441
Materials or structure of filter elements
Official title: {Materials or structure of filter elements, e.g. foams}
F02M35/02441 (Materials or structure of filter elements) appears on 225 US grants and 261 published applications in this corpus.
Search patents in F02M- Granted patents
- 225
- Published applications
- 261
- Assignees
- 80
- Inventors
- 383
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 2 | 4 |
| 2009 | 1 | 2 |
| 2010 | 1 | 4 |
| 2011 | 2 | 3 |
| 2012 | 4 | 5 |
| 2013 | 9 | 8 |
| 2014 | 6 | 24 |
| 2015 | 14 | 23 |
| 2016 | 15 | 22 |
| 2017 | 11 | 23 |
| 2018 | 16 | 23 |
| 2019 | 33 | 28 |
| 2020 | 20 | 19 |
| 2021 | 18 | 23 |
| 2022 | 17 | 13 |
| 2023 | 14 | 17 |
| 2024 | 19 | 9 |
| 2025 | 10 | 4 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter media, filter media packs, and filter elements29 Sep 2026US 12,746,500 B2Donaldson Company, Inc.
- Airbox with debris removal system28 Jul 2026US 12,691,400 B2Caterpillar Inc.
- Filter element, housing for a filter system, and filter system comprising a filter element and a housing21 Jul 2026US 12,685,953 B2Mann+Hummel GmbH
- Filter element with flow directing permeability layers12 May 2026US 12,623,166 B2Atmus Filtration Inc.
- Protuberant compressible filter seal design utilizing undercuts28 Apr 2026US 12,611,624 B2Atmus Filtration Inc.
- Protuberant compressible filter seal design utilizing undercuts13 Aug 2026US 2026/0233138 A1Atmus Filtration Inc.
- System and method of the adsorption of volatile organic compounds18 Jun 2026US 2026/0166465 A1Calgon Carbon Corporation
- Secondary filter element and filter system15 Jan 2026US 2026/0014509 A1Mann+Hummel GmbH
- Filter cartridges; air cleaner assemblies; housings; features; components; and, methods1 May 2025US 2025/0135388 A1Donaldson Company, Inc.
- Airbox with debris removal system13 Mar 2025US 2025/0083082 A1Caterpillar Inc.
Most cited
By later US patents
- Integrated resonator and filter apparatus295US 5,792,247 ADonaldson Company, Inc. · 1998
- Air cleaner arrangements; serviceable filter elements; and, methods177US 7,351,270 B2Donaldson Company, Inc. · 2008
- Air filter cartridge and air cleaner assembly141US 8,292,983 B2Donaldson Company, Inc. · 2012
- Air cleaner arrangements; serviceable filter elements; and, methods134US 7,682,416 B2Donaldson Company, Inc. · 2010
- Air cleaner/noise silencer assembly117US 5,106,397 AFord Motor Company · 1992