B01D 2201/306
Closures, lids, caps or filter heads forming one element with the filtering
Official title: Closures, lids, caps or filter heads forming one element with the filtering element
B01D2201/306 (Closures, lids, caps or filter heads forming one element with the filtering) appears on 81 US grants and 97 published applications in this corpus.
Search patents in B01D- Granted patents
- 81
- Published applications
- 97
- Assignees
- 62
- Inventors
- 218
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 2 |
| 2015 | 1 | 5 |
| 2016 | 2 | 3 |
| 2017 | 5 | 6 |
| 2018 | 5 | 11 |
| 2019 | 7 | 7 |
| 2020 | 9 | 9 |
| 2021 | 7 | 9 |
| 2022 | 10 | 12 |
| 2023 | 12 | 4 |
| 2024 | 3 | 9 |
| 2025 | 8 | 7 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pure water systems25 Aug 2026US 12,715,790 B2Unger Marketing International, LLC
- Filter unit for filtering microparticles and a filter cage for use in a filter unit21 Jul 2026US 12,686,964 B2Xeros Limited
- Filter capable of automatically cutting off gas flow19 May 2026US 12,629,619 B2China University of Petroleum-Beijing
- Filter element with closed endcap forming a seal positioned at different axial distances16 Dec 2025US 12,496,546 B2Cummins Filtration Inc.
- Electrostatically conductive filter element and fuel filter7 Oct 2025US 12,434,177 B2Zhejiang Laien Filtration System Co., Ltd.
- Effluent filtration of a washing machine through a helical brush10 Sep 2026US 2026/0263972 A1MANN+HUMMEL Life Sciences & Environment Holding Singapore Pte. Ltd.
- Modular system for filter containers10 Sep 2026US 2026/0263975 A1
- Micro-fibre filter cartridge and filter unit23 Jul 2026US 2026/0208078 A1
- Swimming Pool Backwash Filtration Device12 Mar 2026US 2026/0071453 A1
- Filter element with closed endcap forming a seal positioned at different axial distances12 Feb 2026US 2026/0042047 A1Cummins Filtration Inc.
Most cited
By later US patents
- Fluid filter assembly130US 5,556,542 AFleetguard, Inc. · 1996
- Fuel filter assembly with in-line valve99US 5,858,227 AParker-Hannifin Corporation · 1999
- Spin-on filter assemblies29US 6,387,259 B1Dana Corporation · 2002
- Filter device27US 4,303,514 A1981
- Fluid filtration system including replaceable filter module22US 6,858,134 B2Arvin Technologies, Inc. · 2005