B01D 24/14
Downward filtration, the container having distribution or collection headers or pervious conduits
Official title: Downward filtration, the container having distribution or collection headers or pervious conduits (B01D24/18 takes precedence)
B01D24/14 (Downward filtration, the container having distribution or collection headers or pervious conduits) appears on 164 US grants and 114 published applications in this corpus.
Search patents in B01D- Granted patents
- 164
- Published applications
- 114
- Assignees
- 113
- Inventors
- 255
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 1 |
| 2002 | 4 | 0 |
| 2003 | 4 | 7 |
| 2004 | 0 | 10 |
| 2005 | 3 | 2 |
| 2006 | 5 | 3 |
| 2007 | 4 | 2 |
| 2008 | 2 | 3 |
| 2009 | 2 | 1 |
| 2010 | 0 | 4 |
| 2011 | 2 | 6 |
| 2012 | 2 | 3 |
| 2013 | 2 | 6 |
| 2014 | 7 | 10 |
| 2015 | 6 | 4 |
| 2016 | 8 | 6 |
| 2017 | 2 | 4 |
| 2018 | 7 | 7 |
| 2019 | 2 | 3 |
| 2020 | 2 | 6 |
| 2021 | 6 | 9 |
| 2022 | 8 | 3 |
| 2023 | 4 | 5 |
| 2024 | 7 | 5 |
| 2025 | 0 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Underdrain for media vessel and method of cleaning18 Aug 2026US 12,708,934 B2Bl Technologies, Inc.
- Media tank31 Dec 2024US 12,179,166 B2A. O. Smith Corporation
- Pool filter assembly29 Oct 2024US 12,128,344 B2
- Particulate filtering device with a multi-layer water distribution and collection structure and method for using the same1 Oct 2024US 12,103,863 B2Zhejiang Hengdong Environmental Technology Co., Ltd.
- Apparatus and method for improving the efficiency of a new or existing filter for filtering water or wastewater6 Aug 2024US 12,053,722 B2Roberts Water Technologies, Inc.
- Adjustable weir for a collection trough, a collection trough and a collection trough assembly24 Sep 2026US 2026/0284558 A1Roberts Water Technologies, Inc.
- Media vessel for liquid treatment5 Mar 2026US 2026/0061344 A1Yardney Water Management Systems Inc.
- Method and Apparatus for Cleaning Filter Media4 Dec 2025US 2025/0367578 A1Veolia Water Solutions & Technologies Support
- Filtration System16 Oct 2025US 2025/0319426 A1
- Underdrain for media vessel and method of cleaning19 Dec 2024US 2024/0416396 A1Bl Technologies, Inc.
Most cited
By later US patents
- Filtering system59US 4,654,142 AEverpure, Inc. · 1987
- Water clarifying apparatus57US 4,931,175 ALenox Institute for Research, Inc. · 1990
- Dual filtering system for swimming pools54US 4,657,673 A1987
- Filter bottom construction46US 4,619,765 ARoberts Filter Manufacturing Company · 1986
- Distributor for filters46US 4,753,726 AEssef Corporation · 1988