F01M 11/12
Concerning lubricant level
Official title: concerning lubricant level
F01M11/12 (Concerning lubricant level) appears on 301 US grants and 221 published applications in this corpus.
Search patents in F01M- Granted patents
- 301
- Published applications
- 221
- Assignees
- 166
- Inventors
- 721
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 10 | 0 |
| 1987 | 5 | 0 |
| 1988 | 10 | 0 |
| 1989 | 3 | 0 |
| 1990 | 7 | 0 |
| 1991 | 11 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 4 | 4 |
| 2004 | 0 | 7 |
| 2005 | 4 | 4 |
| 2006 | 5 | 2 |
| 2007 | 3 | 6 |
| 2008 | 5 | 3 |
| 2009 | 2 | 4 |
| 2010 | 4 | 6 |
| 2011 | 4 | 5 |
| 2012 | 4 | 3 |
| 2013 | 4 | 12 |
| 2014 | 3 | 9 |
| 2015 | 8 | 11 |
| 2016 | 10 | 9 |
| 2017 | 11 | 16 |
| 2018 | 8 | 25 |
| 2019 | 16 | 18 |
| 2020 | 24 | 13 |
| 2021 | 12 | 17 |
| 2022 | 24 | 14 |
| 2023 | 14 | 6 |
| 2024 | 10 | 11 |
| 2025 | 6 | 8 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Refrigerant circulation system29 Sep 2026US 12,747,898 B2Mazda Motor Corporation
- Engine oil consumption detection using oil level and machine tilt25 Aug 2026US 12,716,813 B2Caterpillar Inc.
- Controller, method, and engine system for engine crank control18 Aug 2026US 12,710,002 B2Cummins Power Generation Inc.
- Engine-oil dipstick having a magnet14 Jul 2026US 12,680,483 B2
- Oil level sensing and fault detection16 Jun 2026US 12,656,166 B2Textron Innovations Inc.
- Oil Level Sensing and Fault Detection8 Oct 2026US 2026/0309537 A1Textron Aviation Inc.
- Apparatus and method for monitoring a lubrication system of an aircraft power plant27 Aug 2026US 2026/0251491 A1Pratt & Whitney Canada Corp.
- Reservoir with oil level probe16 Jul 2026US 2026/0202232 A1Safran Aero Boosters SA
- Oil pan for internal combustion engine9 Jul 2026US 2026/0194004 A1Arctic Cat Inc.
- Test dipstick for sealing an oil sump during an engine oil leak test18 Jun 2026US 2026/0168839 A1GM Global Technology Operations LLC
Most cited
By later US patents
- Oil level indicating system for internal combustion engine66US 7,373,912 B2Ford Global Technologies, LLC · 2008
- System for maintaining the quality and level of lubricant in an engine62US 5,964,318 AThe Lubrizol Corporation · 1999
- Oil control unit for high-performance vehicles47US 5,568,842 A1996
- Oil equalization system for parallel connected compressors46US 4,383,802 ADunham-Bush, Inc. · 1983
- Separate oiling system for outboard motor42US 5,149,287 ASanshin Kogyo Kabushiki Kaisha · 1992