F01N 2490/12
Chambers having variable volumes
F01N2490/12 (Chambers having variable volumes) appears on 11 US grants and 8 published applications in this corpus.
Search patents in F01N- Granted patents
- 11
- Published applications
- 8
- Assignees
- 11
- Inventors
- 25
- Latest grant
- 12 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 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 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 2 |
| 2018 | 1 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- 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
- Exhaust system having tunable exhaust sound17 Nov 2020US 10,837,333 B2Ford Global Technologies, LLC
- Exhaust gas aftertreatment device and exhaust gas aftertreatment method22 Oct 2019US 10,450,911 B2MAN Energy Solutions SE
- Damper assembly for a combustion chamber16 Oct 2018US 10,100,688 B2Ansaldo Energia Switzerland AG
- Exhaust handling systems for marine vessels and related methods27 Nov 2025US 2025/0360999 A1Marathon Petroleum Company LP
- Exhaust handling systems for marine vessels and related methods29 Aug 2024US 2024/0286726 A1Marathon Petroleum Company LP
- Exhaust system having tunable exhaust sound4 Jul 2019US 2019/0203619 A1Ford Global Technologies, LLC
- Exhaust Gas Aftertreatment Device And Exhaust Gas Aftertreatment Method2 Nov 2017US 2017/0314434 A1MAN Diesel & Turbo SE
- Damper assembly for a combustion chamber6 Apr 2017US 2017/0096919 A1Ansaldo Energia Switzerland AG
Most cited
By later US patents
- Exhaust silencer unit for propulsion unit40US 5,096,446 ASanshin Kogyo Kanushiki Kaisha · 1992
- Apparatus for damping acoustic vibrations in a combustor33US 6,634,457 B2Alstom (Switzerland) Ltd · 2003
- Resonator type silencer22US 5,283,398 ATsuchiya Mfg. Co., Ltd. · 1994
- Exhaust handling systems for marine vessels and related methods19US 12,043,361 B1Marathon Petroleum Company LP · 2024
- Exhaust system for motorcycle9US 7,779,963 B2Yamaha Hatsudoki Kabushiki Kaisha · 2010