F16J 9/067
Corrugated in the radial direction
Official title: {corrugated in the radial direction}
F16J9/067 (Corrugated in the radial direction) appears on 25 US grants and 6 published applications in this corpus.
Search patents in F16J- Granted patents
- 25
- Published applications
- 6
- Assignees
- 11
- Inventors
- 36
- Latest grant
- 1 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 2 |
| 2022 | 1 | 0 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Multi-piece oil scraper ring with reduced friction1 Aug 2023US 11,713,811 B2Federal-Mogul Burscheid GmbH
- Oil control ring and spacer expander17 May 2022US 11,333,245 B2
- Combination oil ring10 Oct 2017US 9,784,369 B2Tpr Co., Ltd.
- Three-piece oil ring and combination of the three-piece oil ring and piston21 Dec 2010US 7,854,191 B2Nippon Piston Ring Co., Ltd.
- Combined steel oil control ring16 May 2006US 7,044,472 B2Nippon Piston Ring Co., Ltd.
- Multi-piece oil scraper ring with reduced friction2 Sep 2021US 2021/0270368 A1Federal-Mogul Burscheid GmbH
- Spacer expander and oil control ring including same3 Jun 2021US 2021/0164566 A1Riken
- Combination oil ring22 Jun 2017US 2017/0175893 A1Tpr Co., Ltd.
- Three-piece oil ring and combination of the three-piece oil ring and piston15 Jan 2009US 2009/0013866 A1Nippon Piston Ring Co., Ltd.
- Oil-control ring of piston9 Mar 2006US 2006/0049583 A1C.T.I. Traffic Industries Co., Ltd.
Most cited
By later US patents
- Three-piece oil ring and combination of the three-piece oil ring and piston17US 7,854,191 B2Nippon Piston Ring Co., Ltd. · 2010
- Combined steel oil control ring15US 7,044,472 B2Nippon Piston Ring Co., Ltd. · 2006
- Steel oil ring assembly14US 5,129,661 ARiken · 1992
- Spacer expander for piston rings11US 4,762,329 ANippon Piston Ring Co., Ltd. · 1988
- Corrugated expander for piston ring assembly10US 4,542,907 ARiken · 1985