B03C 3/363
Located before the filter
Official title: {located before the filter}
B03C3/363 (Located before the filter) appears on 36 US grants and 41 published applications in this corpus.
Search patents in B03C- Granted patents
- 36
- Published applications
- 41
- Assignees
- 35
- Inventors
- 89
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 2 |
| 2008 | 1 | 2 |
| 2009 | 5 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 1 | 2 |
| 2015 | 2 | 2 |
| 2016 | 0 | 3 |
| 2017 | 3 | 1 |
| 2018 | 3 | 3 |
| 2019 | 0 | 2 |
| 2020 | 2 | 0 |
| 2021 | 2 | 2 |
| 2022 | 0 | 1 |
| 2023 | 0 | 3 |
| 2024 | 5 | 5 |
| 2025 | 2 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Particle collection vessel, particle collection device and particle collection method6 Oct 2026US 12,752,284 B2Amano Corporation
- Electrostatic precipitator with rotary collecting walls2 Jun 2026US 12,643,112 B2Nestec S. A.
- Electrostatic particle collector15 Jul 2025US 12,358,002 B2Epfl-Tto
- Electro-ionic mask devices for improved protection from airborne biopathogens29 Apr 2025US 12,285,766 B2
- Methods and systems for negative ion-based pollution reduction29 Oct 2024US 12,128,424 B2RainIons Corp.
- Ionic Personal Exhalant Filter30 Jul 2026US 2026/0215495 A1Philter Labs, Inc.
- Devices and methods to reduce air pollution and global warming23 Jul 2026US 2026/0208207 A1Temple University of the Commonwealth System of Higher Education
- Electro-ionic mask devices for improved protection from airborne biopathogens9 Oct 2025US 2025/0312802 A1
- Electrostatic binning precipitator16 Jan 2025US 2025/0018402 A1Lyten, Inc.
- Air purifier device24 Oct 2024US 2024/0351048 A1Aerogroupe
Most cited
By later US patents
- Air treatment apparatus having an electrode extending along an axis which is substantially perpendicular to an air flow path23US 7,318,856 B2Sharper Image Corporation · 2008
- Device for cleaning surrounding air fed to passenger compartment of motor vehicle20US 5,454,859 AKansei Corporation · 1995
- Device for cleaning surrounding air fed to passenger compartment of motor vehicle19US 5,368,620 AKansei Corporation · 1994
- Device for cleaning surrounding air fed to passenger compartment of motor vehicle14US 5,501,716 AKansei Corporation · 1996
- Apparatus for filtering gas turbine inlet air14US 7,527,674 B1BHA Group, Inc. · 2009