B01D 27/14
Cartridge filters of the throw-away type: having more than one filtering element
Official title: having more than one filtering element
B01D27/14 (Cartridge filters of the throw-away type: having more than one filtering element) appears on 175 US grants and 178 published applications in this corpus.
Search patents in B01D- Granted patents
- 175
- Published applications
- 178
- Assignees
- 116
- Inventors
- 380
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 7 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 5 |
| 2003 | 3 | 6 |
| 2004 | 4 | 2 |
| 2005 | 2 | 6 |
| 2006 | 6 | 9 |
| 2007 | 1 | 5 |
| 2008 | 3 | 6 |
| 2009 | 0 | 6 |
| 2010 | 4 | 7 |
| 2011 | 3 | 3 |
| 2012 | 7 | 6 |
| 2013 | 4 | 8 |
| 2014 | 2 | 7 |
| 2015 | 6 | 6 |
| 2016 | 8 | 13 |
| 2017 | 7 | 6 |
| 2018 | 7 | 8 |
| 2019 | 5 | 11 |
| 2020 | 6 | 13 |
| 2021 | 9 | 13 |
| 2022 | 8 | 4 |
| 2023 | 11 | 6 |
| 2024 | 9 | 11 |
| 2025 | 3 | 7 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter assembly25 Aug 2026US 12,716,481 B2Filtran LLC
- Water treatment system and method4 Aug 2026US 12,697,567 B2Drops Tech 2015 Ltd
- 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
- Aquarium system, back panel assembly, and methods of use16 Jun 2026US 12,653,167 B2Spectrum Brands, Inc.
- Multistage filter with hydrophobic screen28 Apr 2026US 12,611,622 B2Atmus Filtration Inc.
- Filter cartridge27 Aug 2026US 2026/0250158 A1Gopala AG
- Multistage filter with hydrophobic screen23 Jul 2026US 2026/0208080 A1Atmus Filtration Inc.
- Composite filter cartridge7 May 2026US 2026/0124559 A1Kemflo International Co., Ltd.
- Filter insert with improved filter performance under operating conditions19 Mar 2026US 2026/0077280 A1
- Multi-layer porous polymeric membrane and related filters and methods17 Jul 2025US 2025/0229202 A1Entegris, Inc.
Most cited
By later US patents
- Key system for filter assembly148US 5,035,797 AStanadyne Automotive Corp. · 1991
- Oil filter with inner and outer coaxial filter elements140US 5,342,511 ABaldwin Filters, Inc. · 1994
- Apparatus for filtering impurities out of fluid118US 6,478,958 B1Baldwin Filters, Inc. · 2002
- Lubricant filter for internal combustion engines98US 4,755,289 ATecnocar S p A · 1988
- Apparatus for filtering impurities out of fluid96US 6,787,033 B2Baldwin Filters, Inc. · 2004