B03C 3/30
In which electrostatic charge is generated by passage of the gases, i.e.
Official title: in which electrostatic charge is generated by passage of the gases, i.e. tribo-electricity
B03C3/30 (In which electrostatic charge is generated by passage of the gases, i.e.) appears on 72 US grants and 77 published applications in this corpus.
Search patents in B03C- Granted patents
- 72
- Published applications
- 77
- Assignees
- 55
- Inventors
- 178
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 4 |
| 2008 | 4 | 4 |
| 2009 | 1 | 4 |
| 2010 | 2 | 8 |
| 2011 | 4 | 11 |
| 2012 | 5 | 6 |
| 2013 | 7 | 5 |
| 2014 | 2 | 4 |
| 2015 | 3 | 3 |
| 2016 | 2 | 3 |
| 2017 | 1 | 3 |
| 2018 | 4 | 2 |
| 2019 | 1 | 0 |
| 2020 | 2 | 2 |
| 2021 | 1 | 1 |
| 2022 | 0 | 5 |
| 2023 | 0 | 1 |
| 2024 | 3 | 2 |
| 2025 | 4 | 3 |
By publication year. Applications have been published since 2001.
Recent patents
- Mechanical electrostatic filter assembly30 Dec 2025US 12,508,530 B2
- Collection panels for bathroom aerosols13 May 2025US 12,296,074 B2Kohler Co.
- Sanitization system22 Apr 2025US 12,281,468 B2Kobler Co.
- Filter media for active field polarized media air cleaner4 Feb 2025US 12,214,364 B2Environmental Management Confederation, Inc.
- Methods and systems for negative ion-based pollution reduction29 Oct 2024US 12,128,424 B2RainIons Corp.
- Collection unit for an air filtration system, air filtration system and method of producing a collection element10 Jul 2025US 2025/0222467 A1Teknologian tutkimuskeskus VTT Oy
- Sanitization system3 Jul 2025US 2025/0215679 A1Kohler Co.
- Method for manufacturing electrostatic filter and film for pathogen inactivation27 Mar 2025US 2025/0099977 A1UIF (University Industry Foundation), Yonsei University
- Air Filter and Method for Manufacturing an Air Filter19 Sep 2024US 2024/0307808 A1
- Methods and systems for negative ion-based pollution reduction28 Mar 2024US 2024/0100543 A1RainIons Corp.
Most cited
By later US patents
- High performance, high efficiency filter94US 7,097,694 B1Fleetguard, Inc. · 2006
- Air filter57US 5,037,455 AThe Great American Filter Company · 1991
- Gasketed multi-media air cleaner48US 5,525,136 A1996
- Multi-loading electrostatic air filter and method of filtration41US 5,336,299 A1994
- Reuseable air filter system39US 4,518,402 A1985