F16J 9/02
L-section rings
F16J9/02 (L-section rings) appears on 23 US grants and 16 published applications in this corpus.
Search patents in F16J- Granted patents
- 23
- Published applications
- 16
- Assignees
- 17
- Inventors
- 31
- Latest grant
- 11 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 2 |
| 2015 | 0 | 2 |
| 2016 | 2 | 1 |
| 2017 | 2 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 3 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Piston ring arrangement, piston compressor and method for sealing a compression chamber11 Feb 2025US 12,222,037 B2Burckhardt Compression AG
- Piston ring and piston with internal groove sealing8 Nov 2022US 11,493,129 B2Federal-Mogul Burscheid GmbH
- Two-part oil control ring having axial stabilization and twist compensation22 Dec 2020US 10,871,228 B2Federal-Mogul Burscheid GmbH
- Compressor assembly for a compressed-air feed of a compressed-air supply system1 Dec 2020US 10,851,894 B2WABCO GmbH
- Piston with enhanced cooling gallery25 Aug 2020US 10,753,310 B2Tenneco Inc.
- Piston ring arrangement, piston compressor and method for sealing a compression chamber15 Jun 2023US 2023/0184332 A1Burckhardt Compression AG
- Piston ring and piston with internal groove sealing17 Feb 2022US 2022/0049769 A1Federal-Mogul Burscheid GmbH
- Compressor assembly for a compressed-air feed of a compressed-air supply system23 Jan 2020US 2020/0025189 A1WABCO GmbH
- Two-part oil control ring having axial stabilization and twist compensation18 Jul 2019US 2019/0219168 A1Federal-Mogul Burscheid GmbH
- Compression ring for pistons22 Mar 2018US 2018/0080555 A1MayMaan Research, LLC
Most cited
By later US patents
- Engine block for a multi-cylinder internal combustion engine19US 6,070,562 AEisenwerk Bruehl GmbH · 2000
- Internal combustion engine with gas sealing device18US 4,346,685 AKawasaki Jukogyo Kabushiki Kaisha · 1982
- Two-stroke internal combustion engine with oil ring16US 7,735,834 B2FEV Engine Technology · 2010
- Two ring piston with lower tapered L-shaped ring14US 5,133,563 ABorgo-Nova SpA · 1992
- Ring manufacture, productive of face contact seal10US 3,980,310 AInternational Harvester Company · 1976