B03C 3/155
Filtration
B03C3/155 (Filtration) appears on 364 US grants and 356 published applications in this corpus.
Search patents in B03C- Granted patents
- 364
- Published applications
- 356
- Assignees
- 243
- Inventors
- 698
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 10 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 9 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 10 | 7 |
| 2003 | 9 | 9 |
| 2004 | 5 | 6 |
| 2005 | 4 | 8 |
| 2006 | 6 | 14 |
| 2007 | 11 | 15 |
| 2008 | 9 | 13 |
| 2009 | 8 | 8 |
| 2010 | 8 | 12 |
| 2011 | 8 | 21 |
| 2012 | 9 | 10 |
| 2013 | 13 | 9 |
| 2014 | 9 | 14 |
| 2015 | 8 | 8 |
| 2016 | 9 | 20 |
| 2017 | 13 | 15 |
| 2018 | 11 | 14 |
| 2019 | 15 | 14 |
| 2020 | 5 | 16 |
| 2021 | 13 | 20 |
| 2022 | 17 | 35 |
| 2023 | 8 | 26 |
| 2024 | 24 | 14 |
| 2025 | 16 | 23 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Oil mist filtering apparatus, cooking apparatus including the same, and ventilation system including the same16 Jun 2026US 12,655,993 B2Samsung Electronics Co., Ltd.
- Packed-bed filter for metal fluoride dust trapping in laser discharge chambers7 Apr 2026US 12,597,753 B2Cymer, Inc.
- Mechanical electrostatic filter assembly30 Dec 2025US 12,508,530 B2
- Dust collection filter and dust collection filter manufacturing method16 Dec 2025US 12,496,591 B2LG Electronics Inc.
- Dust collecting filter2 Dec 2025US 12,485,429 B2LG Electronics Inc.
- Hybrid filter unit8 Oct 2026US 2026/0307082 A1Brairtech Sweden AB
- High-voltage electrostatic type air purification module and ionic wind air purifier18 Jun 2026US 2026/0166565 A1Guangdong Tongyuan Electric Appliance Co., Ltd
- Air filter for high-efficiency pm2.5 capture14 May 2026US 2026/0131270 A1The Board of Trustees of the Leland Stanford Junior University
- Electronically enhanced air cleaner with multiple filters and energy grids12 Mar 2026US 2026/0070067 A1Healthway Home Products Company Inc.
- Ionizer and air conditioner equipped with same4 Dec 2025US 2025/0367681 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Air purification electrostatic charcoal filter and method132US 4,244,710 A1981
- Method and apparatus for electrostatically cleaning particulates from air121US 5,330,559 AUnited Air Specialists, Inc. · 1994
- Apparatus and method for neutralizing static electric charges in sensitive manufacturing areas119US 4,477,263 A1984
- Air cleaner with separate ozone and ionizer outputs and method of purifying air114US 5,656,063 AAirlux Electrical Co., Ltd. · 1997
- Portable personal corona discharge device for destruction of airborne microbes and chemical toxins111US 5,667,564 AWein Products, Inc. · 1997