B01D 24/4694
Containing filter material retaining means placed on the surface of the filter
Official title: {containing filter material retaining means (e.g. screens, balls) placed on the surface of the filter material}
B01D24/4694 (Containing filter material retaining means placed on the surface of the filter) appears on 32 US grants and 5 published applications in this corpus.
Search patents in B01D- Granted patents
- 32
- Published applications
- 5
- Assignees
- 19
- Inventors
- 42
- Latest grant
- 28 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Backwashable media bed filtration system and drop in retrofit kit for same28 Jan 2025US 12,208,346 B2Mycelx Technologies Corporation
- Apparatus and method for filtering aqueous liquid30 Nov 2021US 11,185,800 B2Conopco, Inc.
- Filter structure6 Feb 2018US 9,884,271 B2
- Deep media filter12 Aug 2003US 6,605,216 B1Sinomed Ltd.
- Dynamic action filtration system17 Oct 2000US 6,132,611 A
- Automated and self-cleaning gravel pack filter system for water treatment and disposal5 Jun 2025US 2025/0177895 A1Saudi Arabian Oil Company
- Backwashable media bed filtration system and drop in retrofit kit for same13 Apr 2023US 2023/0112945 A1Mycelx Technologies Corporation
- Filter system for treating contaminated liquids31 Mar 2022US 2022/0096968 A1Sonnek Engineering GmbH
- Apparatus and method for filtering aqueous liquid17 Dec 2020US 2020/0391138 A1Conopco, Inc., d/b/a UNILEVER
- Filter structure5 Jan 2017US 2017/0001130 A1
Most cited
By later US patents
- Baffle and wash trough assembly for granular-media filters32US 4,076,625 AGeneral Filter Company · 1978
- Method of simultaneous air-water wash of multiple-media filters30US 4,322,299 AGeneral Filter Company · 1982
- Filtering apparatus and method24US 4,776,962 AJames Howden & Company Limited, a British Company · 1988
- Slow sand filter for use with intermittently flowing water supply and method of use thereof20US 6,123,858 AUniversity Technologies International Inc. · 2000
- Launder with baffle system and regulatable air discharge structure19US 5,286,392 ABaker Hughes Incorporated · 1994