B03C 3/09
Characterised by presence of stationary flat electrodes arranged with their flat surfaces
Official title: characterised by presence of stationary flat electrodes arranged with their flat surfaces at right angles to the gas stream
B03C3/09 (Characterised by presence of stationary flat electrodes arranged with their flat surfaces) appears on 184 US grants and 239 published applications in this corpus.
Search patents in B03C- Granted patents
- 184
- Published applications
- 239
- Assignees
- 133
- Inventors
- 431
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 2 |
| 2004 | 4 | 9 |
| 2005 | 2 | 4 |
| 2006 | 7 | 10 |
| 2007 | 6 | 10 |
| 2008 | 6 | 14 |
| 2009 | 12 | 16 |
| 2010 | 7 | 15 |
| 2011 | 8 | 13 |
| 2012 | 12 | 9 |
| 2013 | 9 | 7 |
| 2014 | 11 | 12 |
| 2015 | 8 | 11 |
| 2016 | 7 | 4 |
| 2017 | 8 | 7 |
| 2018 | 8 | 10 |
| 2019 | 10 | 7 |
| 2020 | 4 | 8 |
| 2021 | 11 | 22 |
| 2022 | 7 | 20 |
| 2023 | 5 | 8 |
| 2024 | 6 | 5 |
| 2025 | 8 | 11 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Cabin air filter with polarisation11 Nov 2025US 12,465,926 B2Hengst GmbH & Co. KG
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Most cited
By later US patents
- Air purifier and ionizer95US 4,253,852 ATau Systems Corporation · 1981
- Apparatus for measuring impurity concentrations in a liquid95US 5,098,657 ATSI Incorporated · 1992
- Electrostatic reduction system for reducing airborne dust and microorganisms77US 6,126,722 AThe United States of America as represented by the Secretary of Agriculture · 2000
- Air filtration system control70US 7,351,274 B2American Standard International Inc. · 2008
- Air filtration system51US 7,332,019 B2American Standard International Inc. · 2008