B01D 2201/12
Pleated filters
B01D2201/12 (Pleated filters) appears on 332 US grants and 378 published applications in this corpus.
Search patents in B01D- Granted patents
- 332
- Published applications
- 378
- Assignees
- 172
- Inventors
- 795
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 3 |
| 2002 | 2 | 4 |
| 2003 | 3 | 7 |
| 2004 | 2 | 7 |
| 2005 | 8 | 7 |
| 2006 | 4 | 9 |
| 2007 | 3 | 7 |
| 2008 | 3 | 12 |
| 2009 | 1 | 10 |
| 2010 | 4 | 8 |
| 2011 | 8 | 11 |
| 2012 | 11 | 17 |
| 2013 | 9 | 13 |
| 2014 | 10 | 15 |
| 2015 | 11 | 17 |
| 2016 | 12 | 19 |
| 2017 | 7 | 20 |
| 2018 | 18 | 31 |
| 2019 | 17 | 18 |
| 2020 | 27 | 33 |
| 2021 | 15 | 29 |
| 2022 | 23 | 23 |
| 2023 | 16 | 17 |
| 2024 | 15 | 20 |
| 2025 | 11 | 13 |
| 2026 | 14 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flat filter media22 Sep 2026US 12,741,238 B2Bullfrog International, LC
- Polyethersulfone fiber webs22 Sep 2026US 12,741,243 B2Hollingsworth & Vose Company
- Retrofitting and use of rectangular filters, assembly and method for filtration25 Aug 2026US 12,714,957 B2Filtration Technology Corporation
- Coalescing media4 Aug 2026US 12,697,570 B2Donaldson Company, Inc.
- Filter arrangements for liquids and methods of use28 Jul 2026US 12,691,395 B2Donaldson Company, Inc.
- Filter arrangements for liquids and methods of use1 Oct 2026US 2026/0295475 A1Donaldson Company, Inc.
- Variable height, offset, angled & bridged embossment16 Jul 2026US 2026/0199811 A1Baldwin Filters, Inc.
- Curved core for variable pleat filter4 Jun 2026US 2026/0151721 A1Donaldson Company, Inc.
- Extruded netting for filters28 May 2026US 2026/0145106 A1DeIStar Technologies, Inc.
- Filter assemblies utilizing full cross-section21 May 2026US 2026/0138067 A1Atmus Filtration IP Inc.
Most cited
By later US patents
- Replacement filter cartridge assembly253US 5,211,846 APleatco Electronic & Filter Corp. · 1993
- Fluid filter element and support148US 4,498,989 ANippondenso Co., Ltd. · 1985
- Filter media cartridge119US 5,601,717 ASiebec S.A. · 1997
- Filter with efficiently sealed end110US 6,902,598 B2Fleetguard, Inc. · 2005
- Filter element for filtering fluid and method of producing same108US 4,430,223 ANippondenso Co., Ltd. · 1984