B01D 27/04
Cartridge filters of the throw-away type: with cartridges made of a piece
Official title: with cartridges made of a piece of unitary material, e.g. filter paper
B01D27/04 (Cartridge filters of the throw-away type: with cartridges made of a piece) appears on 276 US grants and 206 published applications in this corpus.
Search patents in B01D- Granted patents
- 276
- Published applications
- 206
- Assignees
- 142
- Inventors
- 543
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 13 | 0 |
| 1998 | 10 | 0 |
| 1999 | 10 | 0 |
| 2000 | 15 | 0 |
| 2001 | 10 | 4 |
| 2002 | 6 | 6 |
| 2003 | 6 | 9 |
| 2004 | 3 | 3 |
| 2005 | 6 | 7 |
| 2006 | 5 | 12 |
| 2007 | 6 | 8 |
| 2008 | 8 | 13 |
| 2009 | 1 | 4 |
| 2010 | 3 | 4 |
| 2011 | 8 | 7 |
| 2012 | 8 | 4 |
| 2013 | 4 | 12 |
| 2014 | 5 | 8 |
| 2015 | 2 | 5 |
| 2016 | 7 | 13 |
| 2017 | 8 | 7 |
| 2018 | 3 | 10 |
| 2019 | 10 | 17 |
| 2020 | 10 | 10 |
| 2021 | 13 | 10 |
| 2022 | 3 | 13 |
| 2023 | 12 | 9 |
| 2024 | 7 | 4 |
| 2025 | 7 | 2 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Modular graphene oxide-based microbial fuel filter and process of making and using same28 Jul 2026US 12,691,397 B2The United States of America as represented by the Secretary of the Air Force
- Multistage filter with hydrophobic screen28 Apr 2026US 12,611,622 B2Atmus Filtration Inc.
- Fluid filter system with auto drain14 Apr 2026US 12,599,856 B2Axi International Corporation
- Autonomous impeller vacuum cleaner for cleaning swimming pools27 Jan 2026US 12,534,929 B2Kokido Development Limited
- Replaceable spin-on filter with die casted unitary endplate6 Jan 2026US 12,515,147 B2Atmus Filtration IP Inc.
- Multistage filter with hydrophobic screen23 Jul 2026US 2026/0208080 A1Atmus Filtration Inc.
- Filter assemblies utilizing full cross-section21 May 2026US 2026/0138067 A1Atmus Filtration IP Inc.
- Filter cartridge for aquarium; and methods30 Apr 2026US 2026/0115632 A1
- Filter insert with improved filter performance under operating conditions19 Mar 2026US 2026/0077280 A1
- Enhanced fuel water separation using structural embossing5 Feb 2026US 2026/0034481 A1Parker-Hannifin Corporation
Most cited
By later US patents
- Conical filter341US 5,902,364 ADonaldson Company, Inc. · 1999
- Filter material construction and method335US 5,672,399 ADonaldson Company, Inc. · 1997
- Air filter cartridge305US 6,966,940 B2Donaldson Company, Inc. · 2005
- Rolled liquid filter using fluted media291US 5,895,574 ADonaldson Company, Inc. · 1999
- Filter material construction and method190US 6,171,684 B2Donaldson Company, Inc. · 2001