B01D 24/22
Downward filtration, the filter material being supported by pervious surfaces
B01D24/22 (Downward filtration, the filter material being supported by pervious surfaces) appears on 126 US grants and 52 published applications in this corpus.
Search patents in B01D- Granted patents
- 126
- Published applications
- 52
- Assignees
- 67
- Inventors
- 193
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 3 |
| 2003 | 2 | 1 |
| 2004 | 3 | 3 |
| 2005 | 3 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 6 |
| 2015 | 2 | 1 |
| 2016 | 2 | 4 |
| 2017 | 3 | 1 |
| 2018 | 2 | 3 |
| 2019 | 4 | 9 |
| 2020 | 7 | 4 |
| 2021 | 7 | 5 |
| 2022 | 0 | 2 |
| 2023 | 2 | 0 |
| 2024 | 1 | 2 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Devices and methods for moving, removing and/or installing one or more components of a treatment unit9 Dec 2025US 12,491,454 B2Roberts Marketing DE, Inc.
- Solid-liquid filtration assembly and method of use25 Nov 2025US 12,478,900 B2
- Devices and methods for moving, removing and/or installing one or more components of a treatment unit10 Sep 2024US 12,083,451 B2Roberts Marketing DE, Inc.
- Enhanced shape support grid28 Nov 2023US 11,826,678 B2Aqseptence Group, Inc.
- Integrated unit for intake and pretreatment with local backwashing31 Jan 2023US 11,565,199 B2Ide Water Technologies Ltd.
- Devices and methods for moving, removing and/or installing one or more components of a treatment unit5 Mar 2026US 2026/0061345 A1Roberts Marketing DE, Inc.
- Water Holding System2 Oct 2025US 2025/0301974 A1Tankless Pty Ltd
- Automated and self-cleaning gravel pack filter system for water treatment and disposal5 Jun 2025US 2025/0177895 A1Saudi Arabian Oil Company
- Devices and methods for moving, removing and/or installing one or more components of a treatment unit28 Nov 2024US 2024/0390822 A1Roberts Marketing DE, Inc.
- Solid-liquid filtration assembly and method of use1 Aug 2024US 2024/0252957 A1
Most cited
By later US patents
- Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system83US 5,156,738 AJohnson Filtration Systems Inc. · 1992
- Apparatus and method for clarification of water using combined flotation and filtration processes50US 4,377,485 ALenox Institute for Research, Inc. · 1983
- Pelletized composition for treatment of storm water runoff50US 5,624,576 ACSF Treatment Systems, Inc. · 1997
- Filter apparatus41US 4,152,265 AAqua-Aerobic Systems, Inc. · 1979
- Filter media support and containment system39US 4,133,766 AKoppers Company, Inc. · 1979