F02B 23/0636
The combustion space having a substantially flat and horizontal bottom
Official title: {the combustion space having a substantially flat and horizontal bottom}
F02B23/0636 (The combustion space having a substantially flat and horizontal bottom) appears on 105 US grants and 43 published applications in this corpus.
Search patents in F02B- Granted patents
- 105
- Published applications
- 43
- Assignees
- 68
- Inventors
- 197
- Latest grant
- 1 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 5 | 2 |
| 2004 | 3 | 4 |
| 2005 | 3 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 2 | 3 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 3 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 0 | 7 |
| 2016 | 2 | 2 |
| 2017 | 3 | 2 |
| 2018 | 3 | 2 |
| 2019 | 1 | 3 |
| 2020 | 2 | 2 |
| 2021 | 3 | 2 |
| 2022 | 1 | 0 |
| 2023 | 2 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low compression natural gas engine piston bowl for improved combustion stability1 Apr 2025US 12,264,636 B2Caterpillar Inc.
- Piston optimized for combustion flame speed and compression ratio in engine system16 Jul 2024US 12,037,961 B1Caterpillar Inc.
- Low compression natural gas engine piston bowl for improved combustion stability12 Dec 2023US 11,840,983 B2Caterpillar Inc.
- Systems and methods of compression ignition engines21 Mar 2023US 11,608,773 B2Nautilus Engineering, LLC
- Engine system for emission reduction without aftertreatment5 Apr 2022US 11,293,339 B2Cummins Inc.
- Piston for reciprocating within a cylinder in an internal combustion engine18 Jun 2026US 2026/0168460 A1Cummins Inc.
- Low compression natural gas engine piston bowl for improved combustion stability21 Mar 2024US 2024/0093659 A1Caterpillar Inc.
- Low compression natural gas engine piston bowl for improved combustion stability24 Aug 2023US 2023/0265810 A1Caterpillar Inc.
- Systems and methods of compression ignition engines8 Jul 2021US 2021/0207524 A1Nautilus Engineering, LLC
- Engine system for emission reduction without aftertreatment11 Feb 2021US 2021/0040880 A1Cummins Inc.
Most cited
By later US patents
- Combustion system for direct injection diesel engines95US 6,553,960 B1Yanmar Co., Ltd. · 2003
- Internal combustion engine with injection of gaseous fuel64US 6,854,438 B2Westport Germany GmbH · 2005
- Ceramic insulated engine pistons52US 4,245,611 AGeneral Motors Corporation · 1981
- Compression ignition type gasoline engine injecting fuel inside intake port during exhaust stroke44US 5,535,716 AKabushiki Kaisha Toyota Chuo Kenkyusho · 1996
- Combustion chamber for internal combustion engine and process of combustion using fuel radical species42US 5,322,042 ASonex Research, Inc. · 1994