F16J 9/16
Obtained by stacking of rings
Official title: obtained by stacking of rings
F16J9/16 (Obtained by stacking of rings) appears on 85 US grants and 60 published applications in this corpus.
Search patents in F16J- Granted patents
- 85
- Published applications
- 60
- Assignees
- 49
- Inventors
- 132
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 5 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 0 |
| 2005 | 1 | 3 |
| 2006 | 0 | 1 |
| 2007 | 2 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 3 |
| 2014 | 2 | 2 |
| 2015 | 2 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 1 |
| 2019 | 4 | 6 |
| 2020 | 2 | 5 |
| 2021 | 2 | 4 |
| 2022 | 6 | 5 |
| 2023 | 2 | 4 |
| 2024 | 3 | 4 |
| 2025 | 4 | 5 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Seal assembly with anti-rotation feature25 Aug 2026US 12,716,490 B2Pratt & Whitney Canada Corp.
- Piston sealing ring assemblies2 Jun 2026US 12,644,518 B2Mainspring Energy, Inc.
- Sealing ring assemblies configured for pressure locking19 May 2026US 12,631,163 B2Mainspring Engergy, Inc.
- Piston seal ring bypass31 Mar 2026US 12,590,634 B2Rtx Corporation
- Split piston ring unit11 Mar 2025US 12,247,667 B2Mahle International GmbH
- Piston Seal Ring Bypass9 Jul 2026US 2026/0194140 A1Rtx Corporation
- Synchronous Rotation Gapless Piston Rings30 Apr 2026US 2026/0117865 A1LF International, Inc.
- Pressure boosting pump and hydrogen supply system18 Dec 2025US 2025/0383047 A1Mitsubishi Heavy Industries, Ltd.
- Sealing ring assemblies configured for pressure locking7 Aug 2025US 2025/0250970 A1Mainspring Energy, Inc.
- Piston ring assembly19 Jun 2025US 2025/0198513 A1Mahle International GmbH
Most cited
By later US patents