B01D 2201/206
By the weight of the liquid in a tube
Official title: by the weight of the liquid in a tube, e.g. siphon, barometric leg
B01D2201/206 (By the weight of the liquid in a tube) appears on 27 US grants and 20 published applications in this corpus.
Search patents in B01D- Granted patents
- 27
- Published applications
- 20
- Assignees
- 20
- Inventors
- 41
- Latest grant
- 27 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 2 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 2 |
| 2018 | 0 | 2 |
| 2019 | 0 | 1 |
| 2020 | 1 | 2 |
| 2021 | 3 | 1 |
| 2022 | 2 | 3 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Enclosed media fluid filtration device27 May 2025US 12,311,290 B2Advanced Drainage Systems, Inc.
- Filter element with venting function for suspension on a filter head, and a filter system6 Dec 2022US 11,517,836 B2Mann+Hummel GmbH
- Enclosed media fluid filtration device22 Feb 2022US 11,253,799 B2Advanced Drainage Systems, Inc.
- Enclosed media fluid filtration device1 Jun 2021US 11,020,688 B2Advanced Drainage Systems, Inc.
- Water filter cartridge with air conduction9 Mar 2021US 10,940,411 B2Aquis Wasser-Luft-Systeme GmbH, Lindau Zweigniederlassung Rebstein
- Enclosed media fluid filtration device13 Nov 2025US 2025/0345726 A1Advanced Drainage Systems, Inc.
- Liquid filter2 Jun 2022US 2022/0168671 A1Mahle International GmbH
- Filter Element with Venting Function for Suspension on a Filter Head, and a Filter System2 Jun 2022US 2022/0168675 A1Mann+Hummel GmbH
- Enclosed media fluid filtration device5 May 2022US 2022/0134260 A1Advanced Drainage Systems, Inc.
- Enclosed media fluid filtration device29 Jul 2021US 2021/0229002 A1Advanced Drainage Systems, Inc.
Most cited
By later US patents
- Filter cartridge with regulated surface cleaning mechanism44US 6,649,048 B2Stormwater Management, Inc. · 2003
- Gross pollution filter35US 6,086,756 AEcosol PTY LTD · 2000
- Method and apparatus for filtering impurities out of fluid30US 4,655,914 AOrigin Company, Limited · 1987
- Open gravity backwash filter and method27US 4,537,687 AInfilco Degremont Inc. · 1985
- Filter cartridge with check valve protection26US 7,214,311 B2Contech Stormwater Solutions Inc. · 2007