B01D 46/446
By pressure measuring
Official title: {by pressure measuring}
B01D46/446 (By pressure measuring) appears on 365 US grants and 369 published applications in this corpus.
Search patents in B01D- Granted patents
- 365
- Published applications
- 369
- Assignees
- 274
- Inventors
- 979
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 3 |
| 2002 | 7 | 4 |
| 2003 | 3 | 6 |
| 2004 | 9 | 14 |
| 2005 | 9 | 7 |
| 2006 | 3 | 9 |
| 2007 | 5 | 10 |
| 2008 | 6 | 9 |
| 2009 | 8 | 7 |
| 2010 | 4 | 6 |
| 2011 | 6 | 16 |
| 2012 | 5 | 4 |
| 2013 | 8 | 10 |
| 2014 | 9 | 8 |
| 2015 | 6 | 12 |
| 2016 | 11 | 17 |
| 2017 | 9 | 21 |
| 2018 | 19 | 18 |
| 2019 | 18 | 24 |
| 2020 | 19 | 28 |
| 2021 | 20 | 29 |
| 2022 | 17 | 31 |
| 2023 | 24 | 25 |
| 2024 | 18 | 19 |
| 2025 | 22 | 17 |
| 2026 | 15 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control of evacuation stations8 Sep 2026US 12,727,729 B2iRobot Corporation
- Inline air filter apparatuses, systems and methods21 Jul 2026US 12,687,316 B1Rectorseal Corporation
- Laundry treating apparatus and method for controlling the laundry treating apparatus30 Jun 2026US 12,668,914 B2LG Electronics Inc.
- 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.
- Active precleaner system and methods of use24 Sep 2026US 2026/0284565 A1Donaldson Company, Inc.
- Communicating filter plants27 Aug 2026US 2026/0249226 A1Kappa Filter Systems GmbH
- Flue gas cleaning system23 Jul 2026US 2026/0208089 A1Kanadevia Inova AG
- Method for determining an initial filter-loading value of an air-moving device9 Jul 2026US 2026/0191383 A1Dyson Technology Limited
- Controller for internal combustion engine25 Jun 2026US 2026/0176997 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Air cleaner having sealing arrangement between media arrangement and housing342US 6,179,890 B2Donaldson Company, Inc. · 2001
- Air filter gauge172US 6,190,442 B1Tishken Products Co. · 2001
- Surgical evacuation system with a communication circuit for communication between a filter and a smoke evacuation device165US 10,898,622 B2Ethicon, Inc. · 2021
- Detection of clogged filter in an HVAC system137US 6,993,414 B2Carrier Corporation · 2006
- Method and apparatus for predicting life of air filter cartridges88US 5,036,698 AAllied-Signal Inc. · 1991