B01D 46/522
With specific folds
Official title: {with specific folds, e.g. having different lengths}
B01D46/522 (With specific folds) appears on 247 US grants and 314 published applications in this corpus.
Search patents in B01D- Granted patents
- 247
- Published applications
- 314
- Assignees
- 126
- Inventors
- 576
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 2 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 0 | 4 |
| 2007 | 1 | 6 |
| 2008 | 2 | 9 |
| 2009 | 1 | 8 |
| 2010 | 4 | 11 |
| 2011 | 10 | 8 |
| 2012 | 10 | 10 |
| 2013 | 7 | 13 |
| 2014 | 9 | 16 |
| 2015 | 10 | 24 |
| 2016 | 20 | 12 |
| 2017 | 7 | 22 |
| 2018 | 12 | 12 |
| 2019 | 16 | 24 |
| 2020 | 16 | 23 |
| 2021 | 12 | 38 |
| 2022 | 16 | 12 |
| 2023 | 16 | 12 |
| 2024 | 24 | 20 |
| 2025 | 12 | 10 |
| 2026 | 7 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filter media, filter media packs, and filter elements29 Sep 2026US 12,746,500 B2Donaldson Company, Inc.
- Filter element, housing for a filter system, and filter system comprising a filter element and a housing21 Jul 2026US 12,685,953 B2Mann+Hummel GmbH
- Air filter medium, filter pack, air filter unit, and method for producing the same14 Jul 2026US 12,678,723 B2Daikin Industries, Ltd.
- Pleated filter preparation system31 Mar 2026US 12,589,570 B2K&N Engineering, Inc.
- Formed filter media10 Mar 2026US 12,569,797 B2Cummins Filtration Inc.
- Ring filter element assembly including two ring filter elements rotationally aligned relative to each other27 Aug 2026US 2026/0249221 A1Mann+Hummel GmbH
- Filter element and filter device27 Aug 2026US 2026/0249224 A1Mann+Hummel GmbH
- Filter element and filter system27 Aug 2026US 2026/0249227 A1Mann+Hummel GmbH
- Air filter6 Aug 2026US 2026/0225021 A1Nippon Muki Co., Ltd.
- Pleated Filter Preparation System30 Jul 2026US 2026/0216986 A1K&N Engineering, Inc.
Most cited
By later US patents
- Pressure side integrated air filter and filtering networks for engines222US 5,472,463 ACummins Engine Company, Inc. · 1995
- Filter element125US 5,720,790 ADenso Corporation · 1998
- Self-contained, portable room air treatment apparatus and method therefore107US 5,240,478 A1993
- Sintered composite medium and filter88US 4,687,579 AThe United States of America as represented by the United States Department of Energy · 1987
- Fluid treatment elements adapted for cross flow treatment67US 6,702,941 B1Pall Corporation · 2004