F01N 1/085
Throttling exhaust gas flow using a central core in a flow passage
Official title: {throttling exhaust gas flow using a central core in a flow passage}
F01N1/085 (Throttling exhaust gas flow using a central core in a flow passage) appears on 81 US grants and 76 published applications in this corpus.
Search patents in F01N- Granted patents
- 81
- Published applications
- 76
- Assignees
- 52
- Inventors
- 171
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 0 |
| 2004 | 1 | 3 |
| 2005 | 2 | 3 |
| 2006 | 0 | 2 |
| 2007 | 2 | 4 |
| 2008 | 3 | 5 |
| 2009 | 2 | 2 |
| 2010 | 2 | 5 |
| 2011 | 2 | 5 |
| 2012 | 6 | 2 |
| 2013 | 2 | 2 |
| 2014 | 6 | 0 |
| 2015 | 0 | 6 |
| 2016 | 3 | 5 |
| 2017 | 3 | 1 |
| 2018 | 1 | 5 |
| 2019 | 4 | 7 |
| 2020 | 1 | 5 |
| 2021 | 4 | 4 |
| 2022 | 6 | 0 |
| 2023 | 3 | 1 |
| 2024 | 1 | 2 |
| 2025 | 4 | 2 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tunable exhaust system16 Dec 2025US 12,497,913 B2Advanced Flow Engineering, Inc.
- Work vehicle and aftertreatment system therefor7 Oct 2025US 12,435,654 B1Deere & Company
- Turbo-compounded engine with exhaust duct acoustic arrangement16 Sep 2025US 12,415,611 B2Pratt & Whitney Canada Corp.
- Exhaust handling systems for marine vessels and related methods12 Aug 2025US 12,384,508 B2Marathon Petroleum Company LP
- Exhaust handling systems for marine vessels and related methods23 Jul 2024US 12,043,361 B1Marathon Petroleum Company LP
- Variable Muffler7 May 2026US 2026/0125997 A1
- Tunable Exhaust System2 Apr 2026US 2026/0092544 A1Advanced Flow Engineering, Inc.
- Turbo-compounded engine with exhaust duct acoustic arrangement19 Mar 2026US 2026/0077875 A1Pratt & Whitney Canada Corp.
- Exhaust handling systems for marine vessels and related methods27 Nov 2025US 2025/0360999 A1Marathon Petroleum Company LP
- Utility Vehicle9 Oct 2025US 2025/0314191 A1Kubota Corporation
Most cited
By later US patents
- Vehicle exhaust system118US 7,766,123 B2Yamaha Hatsudoki Kabushiki Kaisha · 2010
- Muffler76US 4,890,691 A1990
- Exhaust muffler76US 7,219,764 B1Heartthrob Exhaust Inc. · 2007
- Sound attenuating device and insert38US 5,659,158 AJ. B. Design, Inc. · 1997
- Muffler with partition array36US 6,089,347 AFlowmaster, Inc. · 2000