B01D 46/4272
Special valve constructions adapted to filters or filter elements
Official title: {Special valve constructions adapted to filters or filter elements}
B01D46/4272 (Special valve constructions adapted to filters or filter elements) appears on 287 US grants and 280 published applications in this corpus.
Search patents in B01D- Granted patents
- 287
- Published applications
- 280
- Assignees
- 203
- Inventors
- 639
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 4 | 7 |
| 2003 | 5 | 4 |
| 2004 | 5 | 8 |
| 2005 | 7 | 8 |
| 2006 | 4 | 6 |
| 2007 | 6 | 6 |
| 2008 | 3 | 5 |
| 2009 | 5 | 6 |
| 2010 | 1 | 3 |
| 2011 | 6 | 9 |
| 2012 | 8 | 7 |
| 2013 | 5 | 8 |
| 2014 | 4 | 7 |
| 2015 | 4 | 5 |
| 2016 | 5 | 13 |
| 2017 | 9 | 15 |
| 2018 | 7 | 11 |
| 2019 | 10 | 11 |
| 2020 | 17 | 24 |
| 2021 | 8 | 23 |
| 2022 | 16 | 24 |
| 2023 | 16 | 27 |
| 2024 | 14 | 16 |
| 2025 | 21 | 12 |
| 2026 | 9 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filter device for compressed air21 Jul 2026US 12,685,955 B2
- Fluid delivery module9 Jun 2026US 12,652,983 B2Ichor Systems, Inc.
- Valve arrangement for an industrial dust extractor2 Jun 2026US 12,642,404 B2Husqvarna AB
- Multi-stage coalescing filter21 Apr 2026US 12,605,663 B2Walker Filtration Ltd
- Power tool including an air filter and debris collector24 Mar 2026US 12,582,933 B2Milwaukee Electric Tool Corporation
- Fluid delivery module8 Oct 2026US 2026/0314292 A1Ichor Systems, Inc.
- Filtering device and mounting structure10 Sep 2026US 2026/0263980 A1Yamashin-Filter Corp.
- Power tool including an air filter and debris collector23 Jul 2026US 2026/0208088 A1Milwaukee Electric Tool Corporation
- Filter device for compressed air2 Jul 2026US 2026/0183692 A1
- Pre-filter arrangements and valves for an industrial dust extractor11 Jun 2026US 2026/0157586 A1Husqvarna AB
Most cited
By later US patents
- Air filter especially for cleaning combustion air for internal combustion engines127US 5,893,937 AFilterwerk Mann & Hummel GmbH · 1999
- Method and apparatus for the leak testing of filters91US 4,324,568 AFlanders Filters, Inc. · 1982
- Housing for environmentally friendly filter cartridge80US 7,182,864 B2Baldwin Filters, Inc. · 2007
- Pulsed backflush air filter75US 4,157,899 ACEA Carter-Day Company · 1979
- Process and filter control system for the cyclic counter-scavenging of diaphragm-activated filter hoses72US 4,299,597 AGebruder Buhler AG · 1981