F01M 11/061
Means for keeping lubricant level constant
Official title: {Means for keeping lubricant level constant}
F01M11/061 (Means for keeping lubricant level constant) appears on 64 US grants and 38 published applications in this corpus.
Search patents in F01M- Granted patents
- 64
- Published applications
- 38
- Assignees
- 45
- Inventors
- 134
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 5 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 4 |
| 2006 | 3 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 1 | 3 |
| 2014 | 2 | 3 |
| 2015 | 0 | 4 |
| 2016 | 2 | 4 |
| 2017 | 5 | 1 |
| 2018 | 2 | 4 |
| 2019 | 4 | 4 |
| 2020 | 3 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 3 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Internal combustion engine for a motor vehicle, motor vehicle, and method31 Mar 2026US 12,590,553 B2Bayerische Motoren Werke Aktiengesellschaft
- Device and method for filling an oil reservoir of an aircraft engine23 Apr 2024US 11,964,779 B2Safran Aircraft Engines
- Lube oil replenishment for compressors5 Mar 2024US 11,920,577 B1Saudi Arabian Oil Company
- Assemblies and methods for controlling lubrication for rotary engine apex seals9 Jan 2024US 11,867,101 B1Pratt & Whitney Canada Corp.
- Lubrication system for internal combustion engine7 Nov 2023US 11,808,184 B2Wacker Neuson America Corporation
- Internal Combustion Engine for a Motor Vehicle, Motor Vehicle, and Method18 Apr 2024US 2024/0125258 A1Bayerische Motoren Werke Aktiengesellschaft
- Lubrication System for Internal Combustion Engine20 Apr 2023US 2023/0120773 A1Wacker Neuson America Corporation
- Device and method for filling an oil reservoir of an aircraft engine7 Jul 2022US 2022/0212816 A1Safran Aircraft Engines
- Engine oil recirculation system for extended maintenance interval8 Apr 2021US 2021/0102484 A1Briggs & Stratton Corporation
- Device for supplying an oil tank from a second tank29 Oct 2020US 2020/0340375 A1Safran Aircraft Engines
Most cited
By later US patents
- Oil control unit for high-performance vehicles47US 5,568,842 A1996
- Filter mount43US 5,526,782 AK. J. Manufacturing Co. · 1996
- Oil consumption measurement system for internal combustion engine33US 5,273,134 ADana Corporation · 1993
- Engine oil makeup and extended operation oil exchange system27US 5,238,085 AOnan Corporation · 1993
- Automatic engine oil level maintenance system25US 4,491,103 A1985