B01D 35/16
Cleaning-out devices
Official title: Cleaning-out devices {, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid}
B01D35/16 (Cleaning-out devices) appears on 501 US grants and 522 published applications in this corpus.
Search patents in B01D- Granted patents
- 501
- Published applications
- 522
- Assignees
- 235
- Inventors
- 974
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 8 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 9 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 3 |
| 2002 | 8 | 10 |
| 2003 | 11 | 7 |
| 2004 | 8 | 16 |
| 2005 | 12 | 12 |
| 2006 | 11 | 12 |
| 2007 | 4 | 8 |
| 2008 | 6 | 18 |
| 2009 | 5 | 21 |
| 2010 | 9 | 16 |
| 2011 | 8 | 14 |
| 2012 | 18 | 18 |
| 2013 | 18 | 19 |
| 2014 | 12 | 18 |
| 2015 | 13 | 17 |
| 2016 | 17 | 21 |
| 2017 | 23 | 28 |
| 2018 | 16 | 35 |
| 2019 | 23 | 30 |
| 2020 | 31 | 42 |
| 2021 | 25 | 32 |
| 2022 | 29 | 31 |
| 2023 | 22 | 29 |
| 2024 | 28 | 30 |
| 2025 | 19 | 24 |
| 2026 | 14 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Water purifier7 Jul 2026US 12,673,281 B2Coway Co., Ltd.
- Water purifier16 Jun 2026US 12,654,137 B2Coway Co., Ltd.
- Filter element, filter head, and filter system26 May 2026US 12,636,599 B2Donaldson Company, Inc.
- Water filter priming pump8 Oct 2026US 2026/0306973 A1
- Removable Cartridge Design with Threaded Center Tube2 Jul 2026US 2026/0183684 A1Parker-Hannifin Corporation
- Advanced fuel filtration system with interlocking cartridge seal design25 Jun 2026US 2026/0175149 A1Atmus Filtration Inc.
- Filter element and filter with positioning feature11 Jun 2026US 2026/0158425 A1Zhejiang Laien Filtration System Co., Ltd.
- Discharge closure element for a filter system, filter element, and filter system28 May 2026US 2026/0145104 A1Mann+Hummel GmbH
Most cited
By later US patents
- Pressure filter with vibratory impactor125US 4,526,688 AIndustrial Filter & Pump Mfg. Co. · 1985
- Fuel filter assembly with replacement element105US 5,770,065 AParker-Hannifin Corporation · 1998
- Filter for internal combustion engine fuels93US 6,709,588 B2Filterwerk Mann & Hummel GmbH · 2004
- Fuel filter with dual flow80US 6,113,781 AParker-Hannifin Corporation · 2000
- Liquid filter for the lubricating oil of an internal combustion engine77US 5,098,559 AFilterwerk Mann & Hummel GmbH · 1992