F24F 11/39
Monitoring filter performance
F24F11/39 (Monitoring filter performance) appears on 382 US grants and 468 published applications in this corpus.
Search patents in F24F- Granted patents
- 382
- Published applications
- 468
- Assignees
- 213
- Inventors
- 914
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 11 | 3 |
| 2002 | 6 | 6 |
| 2003 | 5 | 5 |
| 2004 | 5 | 9 |
| 2005 | 3 | 2 |
| 2006 | 8 | 19 |
| 2007 | 6 | 8 |
| 2008 | 4 | 9 |
| 2009 | 4 | 2 |
| 2010 | 5 | 11 |
| 2011 | 3 | 3 |
| 2012 | 5 | 27 |
| 2013 | 7 | 15 |
| 2014 | 10 | 14 |
| 2015 | 25 | 17 |
| 2016 | 7 | 27 |
| 2017 | 21 | 24 |
| 2018 | 19 | 25 |
| 2019 | 25 | 24 |
| 2020 | 25 | 34 |
| 2021 | 27 | 40 |
| 2022 | 24 | 39 |
| 2023 | 25 | 35 |
| 2024 | 36 | 33 |
| 2025 | 17 | 18 |
| 2026 | 16 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Filter unit29 Sep 2026US 12,746,493 B2Samsung Biologics Co., Ltd.
- Monitoring HVAC and R performance degradation using relative COP from joint power and temperature relations30 Jun 2026US 12,669,253 B2Schneider Electric USA, Inc.
- Filter leak detection apparatus30 Jun 2026US 12,669,398 B1Pollux Technologies, Inc.
- Diagnostics of HVAC system based on visual and sound signatures23 Jun 2026US 12,663,173 B2Lennox Industries Inc.
- Method of operating an air cleaning cluster16 Jun 2026US 12,656,010 B2Zehnder Group International AG
- Air Treatment System8 Oct 2026US 2026/0307008 A1Universiteit Antwerpen
- Systems and methods for monitoring the condition of an air filter and of an hvac system24 Sep 2026US 2026/0288101 A13M Innovative Properties Company
- Interpreting Mold Test Results for HVAC Filters17 Sep 2026US 2026/0276229 A1The Lution Company
- Interpreting Mold Test Results for HVAC Filters17 Sep 2026US 2026/0276230 A1The Lution Company
- Air filter with coupled sample collection/analysis27 Aug 2026US 2026/0249222 A1Kappa Filter Systems GmbH
Most cited
By later US patents
- Thermostat operation method and apparatus263US 7,802,618 B2Tim Simon, Inc. · 2010
- Gas purifier262US 6,030,437 AU. S. Philips Corporation · 2000
- Filter clog detection and notification system259US 9,183,723 B2Cleanalert, LLC · 2015
- Fault diagnostics and prognostics based on distance fault classifiers225US 7,188,482 B2Carrier Corporation · 2007
- Method and apparatus for energy recovery in an environmental control system200US 6,062,482 APentech Energy Solutions, Inc. · 2000