B01D 35/31
Including arrangements for environmental protection
Official title: including arrangements for environmental protection, e.g. pressure resisting features
B01D35/31 (Including arrangements for environmental protection) appears on 187 US grants and 138 published applications in this corpus.
Search patents in B01D- Granted patents
- 187
- Published applications
- 138
- Assignees
- 122
- Inventors
- 362
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 16 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 4 |
| 2002 | 6 | 7 |
| 2003 | 11 | 15 |
| 2004 | 5 | 11 |
| 2005 | 5 | 9 |
| 2006 | 7 | 8 |
| 2007 | 11 | 8 |
| 2008 | 5 | 4 |
| 2009 | 3 | 5 |
| 2010 | 3 | 4 |
| 2011 | 2 | 3 |
| 2012 | 1 | 5 |
| 2013 | 3 | 1 |
| 2014 | 1 | 2 |
| 2015 | 1 | 6 |
| 2016 | 2 | 4 |
| 2017 | 3 | 2 |
| 2018 | 4 | 8 |
| 2019 | 4 | 3 |
| 2020 | 4 | 3 |
| 2021 | 1 | 2 |
| 2022 | 4 | 5 |
| 2023 | 2 | 5 |
| 2024 | 3 | 8 |
| 2025 | 0 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Advanced fuel filtration system with interlocking cartridge seal design17 Mar 2026US 12,576,348 B2Atmus Filtration Inc.
- Autonomous impeller vacuum cleaner for cleaning swimming pools27 Jan 2026US 12,534,929 B2Kokido Development Limited
- Hydraulic control line filters for subsea high-pressure application21 May 2024US 11,988,061 B2Oceaneering International, Inc.
- Sealing systems and methods for a filtration system19 Mar 2024US 11,931,676 B2Cummins Filtration Inc.
- Filter with electrostatic discharge mitigation sleeve6 Feb 2024US 11,890,560 B2Entegris, Inc.
- Advanced fuel filtration system with interlocking cartridge seal design25 Jun 2026US 2026/0175149 A1Atmus Filtration Inc.
- Air duct assembly for a refrigeration appliance and refrigeration appliance28 May 2026US 2026/0146781 A1BSH Hausgeräte GmbH
- Filter assembly for an aircraft engine20 Nov 2025US 2025/0352932 A1Pratt & Whitney Canada Corp.
- Method and apparatus for enhanced separation and removal of contaminants and irradiated particulates from fluids23 Oct 2025US 2025/0325930 A1Vrd, LLC
- Pool pump inlet filter assembly21 Aug 2025US 2025/0262580 A1Splash Pool & Spa, Inc.
Most cited
By later US patents
- Environmentally friendly filter cartridge275US 5,685,985 ABaldwin Filters, Inc. · 1997
- Oil filter housing152US 5,738,785 ABaldwin Filters, Inc. · 1998
- Extension and locking assembly for dripless element, and container therefore144US 6,554,139 B1Parker-Hannifin Corporation · 2003
- Fuel filter assembly with in-line valve99US 5,858,227 AParker-Hannifin Corporation · 1999
- Compactable filter and compactable filter mounting means93US 5,250,179 APorous Media Corporation · 1993