F16J 9/26
Piston-rings: characterised by the use of particular materials
Official title: characterised by the use of particular materials
F16J9/26 (Piston-rings: characterised by the use of particular materials) appears on 418 US grants and 429 published applications in this corpus.
Search patents in F16J- Granted patents
- 418
- Published applications
- 429
- Assignees
- 157
- Inventors
- 701
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 8 | 0 |
| 1999 | 1 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 0 |
| 2002 | 1 | 4 |
| 2003 | 4 | 2 |
| 2004 | 4 | 9 |
| 2005 | 2 | 10 |
| 2006 | 5 | 2 |
| 2007 | 3 | 4 |
| 2008 | 3 | 9 |
| 2009 | 1 | 12 |
| 2010 | 2 | 19 |
| 2011 | 6 | 13 |
| 2012 | 12 | 19 |
| 2013 | 9 | 34 |
| 2014 | 13 | 22 |
| 2015 | 25 | 38 |
| 2016 | 31 | 28 |
| 2017 | 25 | 28 |
| 2018 | 25 | 35 |
| 2019 | 34 | 21 |
| 2020 | 18 | 32 |
| 2021 | 23 | 14 |
| 2022 | 18 | 17 |
| 2023 | 12 | 15 |
| 2024 | 16 | 17 |
| 2025 | 15 | 17 |
| 2026 | 14 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Piston ring1 Sep 2026US 12,723,654 B2
- Coating for a piston ring11 Aug 2026US 12,704,177 B2Mahle International GmbH
- Piston sealing ring assemblies2 Jun 2026US 12,644,518 B2Mainspring Energy, Inc.
- Piston ring and method of manufacture2 Jun 2026US 12,644,519 B2Mahle International GmbH
- Gas energized seal for Gifford-McMahon expander26 May 2026US 12,638,220 B2Sumitomo (Shi) Cryogenic of America, Inc.
- Laser Treatment of Piston Seal Rings10 Sep 2026US 2026/0266370 A1Rtx Corporation
- Piston sealing ring assembly having a gap cover element13 Aug 2026US 2026/0235203 A1Mainspring Energy, Inc.
- Light weight hybrid piston seal ring16 Jul 2026US 2026/0201950 A1Rtx Corporation
- Seal Ring Laser Oxide Coating16 Jul 2026US 2026/0201956 A1Rtx Corporation
- Piston Seal Ring Bypass9 Jul 2026US 2026/0194140 A1Rtx Corporation
Most cited
By later US patents
- Process for coating a metallic surface with a wear-resistant material78US 4,218,494 ACentro Richerche Fiat S.p.A. · 1980
- Osmotic delivery systems and piston assemblies for use therein68US 7,682,356 B2Intarcia Therapeutics, Inc. · 2010
- Piston ring64US 6,325,385 B1Teikoku Piston Ring Co., Ltd. · 2001
- Osmotic delivery systems and piston assemblies for use therein57US 7,879,028 B2Intarcia Therapeutics, Inc. · 2011
- Bearing members having coated wear surfaces47US 3,936,295 AKoppers Company, Inc. · 1976