B01D 36/005
Liquid level sensing means
Official title: {Liquid level sensing means, e.g. for water in gasoil-filters}
B01D36/005 (Liquid level sensing means) appears on 140 US grants and 155 published applications in this corpus.
Search patents in B01D- Granted patents
- 140
- Published applications
- 155
- Assignees
- 60
- Inventors
- 346
- Latest grant
- 13 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
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| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 0 | 0 |
| 2003 | 2 | 2 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 3 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 0 | 5 |
| 2010 | 2 | 8 |
| 2011 | 3 | 7 |
| 2012 | 3 | 4 |
| 2013 | 4 | 6 |
| 2014 | 4 | 4 |
| 2015 | 3 | 6 |
| 2016 | 10 | 21 |
| 2017 | 8 | 19 |
| 2018 | 7 | 12 |
| 2019 | 14 | 10 |
| 2020 | 17 | 11 |
| 2021 | 11 | 9 |
| 2022 | 9 | 8 |
| 2023 | 9 | 5 |
| 2024 | 4 | 5 |
| 2025 | 6 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filter device13 Jan 2026US 12,521,653 B2Zhejiang Weitai Automobile Parts Co., Ltd.
- Torsional no filter no run system8 Jul 2025US 12,350,611 B2Cummins Filtration IP, Inc.
- Filtration assembly including a filtering cartridge and a filter body10 Jun 2025US 12,324,996 B2Ufi Filters S.P.A.
- Water retention barrier13 May 2025US 12,296,286 B2Cummins Filtration IP, Inc.
- Low level water sensor and method of use13 May 2025US 12,298,167 B2Franklin Fueling Systems, Inc.
- Oil purification apparatus23 Jul 2026US 2026/0208081 A1TWO-N Co., Ltd.
- Diesel fuel filter13 Nov 2025US 2025/0345731 A1Hyundai Motor Company
- Low level water sensor and method of use28 Aug 2025US 2025/0271290 A1Franklin Fueling Systems, Inc.
- Dual stage advanced fuel water separator2 Jan 2025US 2025/0001332 A1Cummins Filtration Inc.
- Filter cartridge for insertion in a filter housing of a fluid filter19 Sep 2024US 2024/0307800 A1
Most cited
By later US patents
- Fuel filter with dual flow80US 6,113,781 AParker-Hannifin Corporation · 2000
- Filter assembly77US 4,502,955 ARacor Industries, Inc. · 1985
- Fuel filter assembly with standpipe having valve element61US 6,171,491 B2Parker-Hannifin Corporation · 2001
- Cartridge and cover assembly for fluid filters59US 4,836,923 AParker-Hannifin Corporation · 1989
- Fuel filter and priming pump47US 5,643,446 AParker-Hannifin Corporation · 1997