B01D 46/525
Which comprises flutes
Official title: {which comprises flutes}
B01D46/525 (Which comprises flutes) appears on 577 US grants and 649 published applications in this corpus.
Search patents in B01D- Granted patents
- 577
- Published applications
- 649
- Assignees
- 103
- Inventors
- 661
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 2 |
| 2002 | 6 | 13 |
| 2003 | 8 | 9 |
| 2004 | 8 | 14 |
| 2005 | 9 | 15 |
| 2006 | 11 | 25 |
| 2007 | 13 | 24 |
| 2008 | 14 | 30 |
| 2009 | 7 | 25 |
| 2010 | 23 | 37 |
| 2011 | 40 | 41 |
| 2012 | 35 | 29 |
| 2013 | 39 | 27 |
| 2014 | 34 | 37 |
| 2015 | 21 | 32 |
| 2016 | 27 | 24 |
| 2017 | 28 | 30 |
| 2018 | 26 | 35 |
| 2019 | 33 | 24 |
| 2020 | 29 | 34 |
| 2021 | 27 | 27 |
| 2022 | 28 | 32 |
| 2023 | 25 | 20 |
| 2024 | 32 | 31 |
| 2025 | 21 | 24 |
| 2026 | 12 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Filter media, filter media packs, and filter elements29 Sep 2026US 12,746,500 B2Donaldson Company, Inc.
- Sanitary mask sheet21 Jul 2026US 12,685,352 B2Kao Corporation
- Air cleaner bypass assembly and method of operating16 Jun 2026US 12,654,121 B2Donaldson Company, Inc.
- Active precleaner system and methods of use2 Jun 2026US 12,643,066 B2Donaldson Company, Inc.
- Filter element with flow directing permeability layers12 May 2026US 12,623,166 B2Atmus Filtration Inc.
- Filter element for use with dust collector & other applications8 Oct 2026US 2026/0306986 A1Donaldson Company, Inc.
- Active precleaner system and methods of use24 Sep 2026US 2026/0284565 A1Donaldson Company, Inc.
- Sanitary mask sheet17 Sep 2026US 2026/0272077 A1Kao Corporation
- Filter cartridges; air cleaner assemblies; housing; features; components; and methods13 Aug 2026US 2026/0233141 A1Donaldson Company, Inc.
- Filter assemblies and elements utilizing multilayered and wrapped filter media4 Jun 2026US 2026/0151723 A1Atmus Filtration IP Inc.
Most cited
By later US patents
- Inline filter apparatus526US 5,820,646 ADonaldson Company, Inc. · 1998
- Filter arrangement; sealing system; and methods402US 6,190,432 B1Donaldson Company, Inc. · 2001
- Filter element incorporating a handle member390US 6,235,195 B1Donaldson Company, Inc. · 2001
- Air filtration arrangements having fluted media constructions and methods381US 6,673,136 B2Donaldson Company, Inc. · 2004
- Air filter arrangement having first and second filter media dividing a housing and methods343US 6,210,469 B1Donaldson Company, Inc. · 2001