F02G 2253/02
Reciprocating piston seals
F02G2253/02 (Reciprocating piston seals) appears on 44 US grants and 10 published applications in this corpus.
Search patents in F02G- Granted patents
- 44
- Published applications
- 10
- Assignees
- 23
- Inventors
- 80
- Latest grant
- 4 Jun 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
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- Moteur thermique alternatif a culasse chaude et cylindre froid28 Sep 2023US 2023/0304456 A1
- Reinforced sealing rings10 Mar 2022US 2022/0074493 A1Mainspring Energy, Inc.
- Reinforced sealing rings19 Nov 2020US 2020/0362966 A1Mainspring Energy, Inc.
- Reinforced sealing rings14 Feb 2019US 2019/0049012 A1EtaGen, Inc.
- Stirling Machine7 Feb 2013US 2013/0031899 A1
Most cited
By later US patents
- Seal mechanism for a Stirling engine33US 4,736,586 AMitsubishi Denki Kabushiki Kaisha · 1988
- Stirling engine with improved piston ring assembly30US 4,615,261 AStirling Thermal Motors, Inc. · 1986
- Seal ring29US 4,185,842 ANippon Piston Ring Co., Ltd. · 1980
- Regenerative internal combustion engine28US 4,928,658 A1990
- Heat engine heater head assembly25US 6,282,895 B1STM Power, Inc. · 2001