F01N 3/227
Using pneumatically operated valves
Official title: {using pneumatically operated valves, e.g. membrane valves}
F01N3/227 (Using pneumatically operated valves) appears on 213 US grants and 22 published applications in this corpus.
Search patents in F01N- Granted patents
- 213
- Published applications
- 22
- Assignees
- 61
- Inventors
- 311
- Latest grant
- 19 Dec 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 28 | 0 |
| 1977 | 15 | 0 |
| 1978 | 16 | 0 |
| 1979 | 35 | 0 |
| 1980 | 21 | 0 |
| 1981 | 16 | 0 |
| 1982 | 10 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 3 |
| 2005 | 2 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 2 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 2 |
| 2022 | 2 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Valve device for an internal combustion engine19 Dec 2023US 11,846,225 B2Pierburg GmbH
- Exhaust gas temperature control27 Dec 2022US 11,536,177 B2Carrier Corporation
- Valve device7 Jun 2022US 11,352,928 B2Msg Mechatronic Systems GmbH
- Exhaust heat recovery structure20 Apr 2021US 10,982,580 B2Toyota Jidosha Kabushiki Kaisha
- Secondary air introduction device17 Mar 2020US 10,590,826 B2Suzuki Motor Corporation
- 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
- Vehicle3 Apr 2025US 2025/0109727 A1Kawasaki Motors, Ltd.
- Valve device for an internal combustion engine8 Sep 2022US 2022/0282656 A1Pierburg GmbH
- Valve device24 Jun 2021US 2021/0189938 A1Msg Mechatronic Systems GmbH
- Exhaust gas temperature control11 Mar 2021US 2021/0071557 A1Carrier Corporation
Most cited
By later US patents
- Air/fuel ratio control for an internal combustion engine using an exhaust gas sensor70US 4,252,098 AChrysler Corporation · 1981
- Method of and apparatus for reducing emitted amount of particulates contained in exhaust gas of diesel engine69US 4,404,795 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1983
- Secondary air regulating system41US 3,962,867 ANissan Motor Co., Ltd. · 1976
- Method and installation for the predetermined addition of secondary air for the optimum combustion of exhaust gases of internal combustion engines30US 3,931,710 ADeutsche Vergaser GmbH & Co. Kommanditgesellschaft · 1976
- Closed loop fuel control using air injection in open loop modes30US 3,986,352 AGeneral Motors Corporation · 1976