F01N 2270/00
Mixing air with exhaust gases
F01N2270/00 (Mixing air with exhaust gases) appears on 269 US grants and 220 published applications in this corpus.
Search patents in F01N- Granted patents
- 269
- Published applications
- 220
- Assignees
- 185
- Inventors
- 683
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 7 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 7 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 1 | 4 |
| 2005 | 2 | 1 |
| 2006 | 0 | 8 |
| 2007 | 4 | 14 |
| 2008 | 4 | 6 |
| 2009 | 3 | 15 |
| 2010 | 11 | 15 |
| 2011 | 7 | 8 |
| 2012 | 10 | 7 |
| 2013 | 10 | 7 |
| 2014 | 3 | 10 |
| 2015 | 5 | 8 |
| 2016 | 12 | 20 |
| 2017 | 10 | 18 |
| 2018 | 7 | 9 |
| 2019 | 14 | 6 |
| 2020 | 11 | 14 |
| 2021 | 11 | 19 |
| 2022 | 20 | 7 |
| 2023 | 9 | 10 |
| 2024 | 8 | 6 |
| 2025 | 7 | 4 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 2270/02Mixing air with exhaust gases: for cooling exhaust gases or the apparatusIndexing code104
- F01N 2270/04Mixing air with exhaust gases: for afterburningIndexing code79
- F01N 2270/08Mixing air with exhaust gases: for evacuation of exhaust gasesIndexing code32
- F01N 2270/10Mixing air with exhaust gases: for rendering exhaust innocuousIndexing code32
- F01N 2270/06Mixing air with exhaust gases: for silencingIndexing code9
Recent patents
- System for cooling catalyzed combustion exhaust gas of hydrocarbon fueled internal combustion engines used in small power equipment and power tools16 Jun 2026US 12,655,780 B2Harbor Freight Tools USA, Inc.
- Systems and methods for reducing emissions21 Apr 2026US 12,607,153 B2General Electric Company
- Dilution gas mixing unit and exhaust gas analysis system6 Jan 2026US 12,517,019 B2Horiba, Ltd.
- Three-way catalytic converter and device for processing tail gas16 Dec 2025US 12,497,914 B2Shanghai Fusion Tech Co., Ltd.
- Dual purpose energy plant16 Sep 2025US 12,416,245 B2Nuovo Pignone Tecnologie Srl
- Dual Venturi Exhaust Assembly20 Aug 2026US 2026/0243189 A1
- Secondary Air Valve for a Secondary Air System of an Internal Combustion Engine, Internal Combustion Engine and Motor Vehicle30 Jul 2026US 2026/0218643 A1Mercedes-Benz Group AG
- Exhaust purification device19 Mar 2026US 2026/0078692 A1Subaru Corporation
- Ventilation type silencer3 Jul 2025US 2025/0216119 A1FUJIFILM Corporation
- Three-way catalytic converter and device for processing tail gas12 Jun 2025US 2025/0188857 A1Shanghai Fusion Tech Co., Ltd.
Most cited
By later US patents
- Exhaust gas purification system for an internal combustion engine99US 5,331,809 AToyota Jidosha Kabushiki Kaisha · 1994
- System for NOx reduction in exhaust gases64US 6,805,849 B1HJS Fahrzeugtechnik GmbH & Co. · 2004
- Pulse jet filter cleaning system59US 5,616,171 ADonaldson Company, Inc. · 1997
- Device for removal of particulates from exhaust and flue gases55US 5,199,257 ACentro Sviluppo Materiali S.p.A. · 1993
- Combination catalytic converter and muffler for an exhaust system53US 4,209,493 ANelson Industries, Inc. · 1980