B01D 24/24
Downward filtration, the container having distribution or collection headers or pervious conduits
B01D24/24 (Downward filtration, the container having distribution or collection headers or pervious conduits) appears on 194 US grants and 134 published applications in this corpus.
Search patents in B01D- Granted patents
- 194
- Published applications
- 134
- Assignees
- 86
- Inventors
- 208
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 8 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 2 |
| 2002 | 0 | 4 |
| 2003 | 3 | 8 |
| 2004 | 5 | 5 |
| 2005 | 2 | 5 |
| 2006 | 11 | 6 |
| 2007 | 3 | 4 |
| 2008 | 2 | 6 |
| 2009 | 3 | 6 |
| 2010 | 5 | 5 |
| 2011 | 7 | 4 |
| 2012 | 5 | 5 |
| 2013 | 4 | 5 |
| 2014 | 6 | 11 |
| 2015 | 8 | 11 |
| 2016 | 6 | 8 |
| 2017 | 5 | 5 |
| 2018 | 9 | 7 |
| 2019 | 6 | 5 |
| 2020 | 5 | 4 |
| 2021 | 9 | 7 |
| 2022 | 2 | 0 |
| 2023 | 3 | 3 |
| 2024 | 2 | 4 |
| 2025 | 2 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Biofilter with shaped underdrain assembly12 May 2026US 12,623,939 B2Johnson Screens, Inc.
- Media retention plate for a block underdrain system11 Mar 2025US 12,246,271 B2De Nora Water Technologies, LLC
- Backwashable media bed filtration system and drop in retrofit kit for same28 Jan 2025US 12,208,346 B2Mycelx Technologies Corporation
- Apparatus and method to prevent downward flow of liquid during a gas only washing cycle13 Aug 2024US 12,059,637 B2Roberts Marketing DE, Inc.
- Filter device2 Apr 2024US 11,945,734 B2
- Waste water treatment system25 Jun 2026US 2026/0175147 A1Altinay Savunma Teknolojileri Anonim Sirketi
- Method and System for Anchoring an Underdrain21 May 2026US 2026/0138055 A1Xylem Water Solutions Zelienople LLC
- Media retention plate for a block underdrain system12 Jun 2025US 2025/0186908 A1De Nora Water Technologies, LLC
- Hydraulic sludge recovery system27 Mar 2025US 2025/0099880 A1The Board of Trustees of the Leland Stanford Junior University
- Media retention plate for a block underdrain system10 Oct 2024US 2024/0335770 A1De Nora Water Technologies, LLC
Most cited
By later US patents
- Method and apparatus for treating stormwater runoff122US 6,277,274 B12001
- Method and apparatus for treating storm water107US 5,322,629 AW & H Pacific Inc. · 1994
- Apparatus for uniformly distributing gas and/or liquid in an underdrain lateral system83US 5,156,738 AJohnson Filtration Systems Inc. · 1992
- Filter underdrain apparatus with partitioned distributor conduits62US 5,019,259 A1991
- Method and apparatus for treating stormwater runoff54US 6,569,321 B22003