B01D 29/031
With corrugated, folded filtering elements
Official title: {with corrugated, folded filtering elements}
B01D29/031 (With corrugated, folded filtering elements) appears on 42 US grants and 45 published applications in this corpus.
Search patents in B01D- Granted patents
- 42
- Published applications
- 45
- Assignees
- 25
- Inventors
- 93
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 0 | 2 |
| 2004 | 3 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 1 | 2 |
| 2013 | 2 | 2 |
| 2014 | 2 | 2 |
| 2015 | 3 | 3 |
| 2016 | 0 | 3 |
| 2017 | 0 | 1 |
| 2018 | 1 | 2 |
| 2019 | 0 | 2 |
| 2020 | 2 | 3 |
| 2021 | 3 | 6 |
| 2022 | 1 | 2 |
| 2023 | 1 | 1 |
| 2024 | 5 | 3 |
| 2025 | 2 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Flat filter media22 Sep 2026US 12,741,238 B2Bullfrog International, LC
- 3D printed filter center tube6 Jan 2026US 12,515,148 B2Caterpillar Inc.
- Filtration system for a water drainage system26 Aug 2025US 12,397,248 B2
- Fluid drainage system with textured core sheets1 Jul 2025US 12,343,661 B2Eljen Corporation
- Fluted filtration media, filtration media packs, and filtration elements24 Sep 2024US 12,097,459 B2Donaldson Company, Inc.
- Filtration system for a water drainage system13 Nov 2025US 2025/0345728 A1
- Filter material comprising nanofiber layer and filter element composed of such filter material18 Sep 2025US 2025/0288928 A1
- Flat filter media27 Feb 2025US 2025/0065250 A1Bullfrog International, LC
- Fluid Drainage System with Textured Core Sheets12 Sep 2024US 2024/0299866 A1Eljen Corporation
- Nonwoven material adapted for high efficiency air filtration22 Aug 2024US 2024/0279858 A1North Carolina State University
Most cited
By later US patents
- Process for providing a filter insert55US 5,804,014 ADetroit Holding Limited · 1998
- Solar cell and method for manufacturing a solar cell54US 5,704,992 A1998
- Cross-pleated membrane cartridges, and method and apparatus for making cross-pleated membrane cartridges39US 8,157,891 B2DPoint Technologies Inc. · 2012
- High capacity filter28US 5,785,851 AVesuvius Crucible Company · 1998
- Convoluted plural layer filter assembly23US 4,479,874 APall Corporation · 1984