F01N 2230/02
Exhaust filters
F01N2230/02 (Exhaust filters) appears on 79 US grants and 40 published applications in this corpus.
Search patents in F01N- Granted patents
- 79
- Published applications
- 40
- Assignees
- 50
- Inventors
- 165
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 4 |
| 2005 | 1 | 0 |
| 2006 | 1 | 3 |
| 2007 | 0 | 5 |
| 2008 | 4 | 1 |
| 2009 | 1 | 3 |
| 2010 | 2 | 2 |
| 2011 | 4 | 3 |
| 2012 | 3 | 1 |
| 2013 | 1 | 2 |
| 2014 | 2 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 0 |
| 2017 | 4 | 3 |
| 2018 | 0 | 2 |
| 2019 | 1 | 1 |
| 2020 | 2 | 3 |
| 2021 | 2 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-stage emission system for large displacement compression ignition non-road diesel generator systems for emergency and non-emergency stationary power applications14 Jul 2026US 12,680,488 B2Bluefin ESI, Inc.
- Control device and method for controlling an exhaust gas aftertreatment system28 Jan 2025US 12,209,520 B2Scania CV AB
- Pillar shaped honeycomb structure, exhaust gas purifying device, exhaust system, and method for producing honeycomb structure28 Mar 2023US 11,614,011 B2NGK Insulators, Ltd.
- Method and apparatus to enable package space reduction in a vehicle exhaust system12 Oct 2021US 11,143,069 B2Faurecia Emissions Control Technologies, USA, LLC
- Exhaust purification system of internal combustion engine12 Oct 2021US 11,143,082 B2Toyota Jidosha Kabushiki Kaisha
- Multi-stage emission system for large displacement compression ignition non-road diesel generator systems for emergency and non-emergency stationary power applications28 May 2026US 2026/0146552 A1Bluefin ESI, Inc.
- Two-layer, three-way catalyst with significantly improved co conversion4 Dec 2025US 2025/0367603 A1Umicore AG & Co. KG
- Control device and method for controlling an exhaust gas aftertreatment system9 May 2024US 2024/0151171 A1Scania CV AB
- Pillar shaped honeycomb structure, exhaust gas purifying device, exhaust system, and method for producing honeycomb structure22 Apr 2021US 2021/0115825 A1NGK Insulators, Ltd.
- Acoustic volume in hot-end of exhaust systems4 Jun 2020US 2020/0173320 A1Faurecia Emissions Control Technologies, USA, LLC
Most cited
By later US patents
- Muffler apparatus with filter trap and method of use96US 4,851,015 ADonaldson Company, Inc. · 1989
- Portable engine-generator set88US 4,608,946 AHonda Giken Kogyo Kabushiki Kaisha · 1986
- Silencer83US 6,312,650 B1Silentor Holding A/S · 2001
- Exhaust gas purifying apparatus built-in to a muffler for a diesel engine76US 4,916,897 AToyota Jidosha Kabushiki Kaisha · 1990
- Muffler and exhaust gas purifier for internal combustion engines57US 4,032,310 A1977