F02F 3/12
On piston heads
Official title: on piston heads
F02F3/12 (On piston heads) appears on 178 US grants and 172 published applications in this corpus.
Search patents in F02F- Granted patents
- 178
- Published applications
- 172
- Assignees
- 102
- Inventors
- 468
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 9 | 0 |
| 1986 | 3 | 0 |
| 1987 | 9 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 3 |
| 2005 | 1 | 2 |
| 2006 | 3 | 2 |
| 2007 | 0 | 5 |
| 2008 | 2 | 1 |
| 2009 | 1 | 6 |
| 2010 | 2 | 3 |
| 2011 | 3 | 4 |
| 2012 | 0 | 7 |
| 2013 | 1 | 10 |
| 2014 | 6 | 6 |
| 2015 | 2 | 9 |
| 2016 | 4 | 13 |
| 2017 | 7 | 21 |
| 2018 | 11 | 11 |
| 2019 | 14 | 16 |
| 2020 | 15 | 14 |
| 2021 | 9 | 10 |
| 2022 | 6 | 6 |
| 2023 | 7 | 7 |
| 2024 | 4 | 4 |
| 2025 | 6 | 4 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Piston and injector for reduced head thermal loading12 May 2026US 12,624,671 B1Deere & Company
- Internal combustion engine25 Nov 2025US 12,480,457 B2
- Internal combustion engine23 Sep 2025US 12,421,875 B2
- Ammonia-burning combustion engine19 Aug 2025US 12,392,277 B2Johnson Matthey Public Limited Company
- Piston for an internal combustion engine and method of manufacturing the piston17 Jun 2025US 12,331,697 B2Mahle International GmbH
- Piston and injector for reduced head thermal loading14 May 2026US 2026/0132756 A1Deere & Company
- H11 and h13 steels for piston application30 Apr 2026US 2026/0117864 A1Cummins Inc.
- Piston26 Mar 2026US 2026/0085647 A1Toyota Jidosha Kabushiki Kaisha
- Multi-composition thermal management coating systems for combustion chamber components26 Feb 2026US 2026/0055714 A1Cummins Inc.
- Coating system22 Jan 2026US 2026/0022678 A1Volvo Truck Corporation
Most cited
By later US patents
- Ceramic thermal barrier coating for rapid thermal cycling applications69US 5,320,909 ACummins Engine Company, Inc. · 1994
- Engine system employing an unsymmetrical cycle56US 6,170,441 B2Quantum Energy Technologies · 2001
- Ceramic insulated engine pistons52US 4,245,611 AGeneral Motors Corporation · 1981
- Process of joining a ceramic insert which is adapted to be embedded in a light metal casting for use in internal combustion engines38US 4,495,684 AKarl Schmidt GmbH · 1985
- Internal combustion engine piston with threaded ceramic piston head37US 4,887,518 ANGK Insulators, Ltd. · 1989