B01D 2201/301
Details of removable closures, lids, caps, filter heads
B01D2201/301 (Details of removable closures, lids, caps, filter heads) appears on 1,514 US grants and 1,742 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,514
- Published applications
- 1,742
- Assignees
- 618
- Inventors
- 2,607
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 3 | 0 |
| 1985 | 7 | 0 |
| 1986 | 7 | 0 |
| 1987 | 11 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 8 | 0 |
| 1991 | 12 | 0 |
| 1992 | 8 | 0 |
| 1993 | 13 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 12 | 0 |
| 1997 | 15 | 0 |
| 1998 | 26 | 0 |
| 1999 | 24 | 0 |
| 2000 | 15 | 0 |
| 2001 | 17 | 11 |
| 2002 | 26 | 34 |
| 2003 | 36 | 68 |
| 2004 | 40 | 51 |
| 2005 | 33 | 46 |
| 2006 | 34 | 48 |
| 2007 | 32 | 46 |
| 2008 | 19 | 40 |
| 2009 | 24 | 49 |
| 2010 | 22 | 52 |
| 2011 | 32 | 29 |
| 2012 | 37 | 38 |
| 2013 | 31 | 54 |
| 2014 | 32 | 62 |
| 2015 | 45 | 64 |
| 2016 | 53 | 64 |
| 2017 | 50 | 75 |
| 2018 | 68 | 90 |
| 2019 | 67 | 79 |
| 2020 | 86 | 128 |
| 2021 | 68 | 117 |
| 2022 | 104 | 143 |
| 2023 | 101 | 94 |
| 2024 | 97 | 113 |
| 2025 | 85 | 75 |
| 2026 | 52 | 72 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Recovery tank22 Sep 2026US 12,740,683 B2SharkNinja Operating LLC
- Water filter cartridge and head having keyed engagement8 Sep 2026US 12,728,373 B2Culligan International Company
- Air purifier8 Sep 2026US 12,729,867 B2Shenzhen Chenbei Technology Co., Ltd.
- Filter cartridge and filter having same25 Aug 2026US 12,714,954 B2Solventum Intellectual Properties Company
- Pure water systems25 Aug 2026US 12,715,790 B2Unger Marketing International, LLC
- Animal watering system8 Oct 2026US 2026/0305570 A1Aborder Products, Inc.
- Filter assemblies and related filter elements8 Oct 2026US 2026/0306974 A1Donaldson Company, Inc.
- Filter Element with Biplanar O-Ring1 Oct 2026US 2026/0295481 A1Parker-Hannifin Corporation
- Filter interconnect utilizing a magnetic repulsion force1 Oct 2026US 2026/0295483 A1KX Technologies LLC
- Axial flow single split filter24 Sep 2026US 2026/0284557 A1Atmus Filtration Inc.
Most cited
By later US patents
- Fluid filter system524US 8,272,516 B2Advanced Filtration Systems Inc. · 2012
- Disposable vacuum filtration apparatus capable of detecting microorganisms and particulates in liquid samples489US 6,913,152 B22005
- Inductively powered lamp assembly370US 6,731,071 B2Access Business Group International LLC · 2004
- Inductively powered lamp assembly317US 6,917,163 B2Access Business Group International LLC · 2005
- Inductively powered lamp assembly315US 6,812,645 B2Access Business Group International LLC · 2004