F01M 13/04
Crankcase ventilating or breathing: having means for purifying air before leaving crankcase
Official title: having means for purifying air before leaving crankcase, e.g. removing oil
F01M13/04 (Crankcase ventilating or breathing: having means for purifying air before leaving crankcase) appears on 1,422 US grants and 1,278 published applications in this corpus.
Search patents in F01M- Granted patents
- 1,422
- Published applications
- 1,278
- Assignees
- 439
- Inventors
- 2,523
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 6 | 0 |
| 1981 | 8 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 14 | 0 |
| 1986 | 14 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 7 | 0 |
| 1990 | 11 | 0 |
| 1991 | 12 | 0 |
| 1992 | 9 | 0 |
| 1993 | 12 | 0 |
| 1994 | 11 | 0 |
| 1995 | 11 | 0 |
| 1996 | 17 | 0 |
| 1997 | 14 | 0 |
| 1998 | 14 | 0 |
| 1999 | 21 | 0 |
| 2000 | 30 | 0 |
| 2001 | 28 | 20 |
| 2002 | 33 | 33 |
| 2003 | 38 | 38 |
| 2004 | 37 | 37 |
| 2005 | 24 | 30 |
| 2006 | 33 | 32 |
| 2007 | 24 | 39 |
| 2008 | 29 | 36 |
| 2009 | 29 | 61 |
| 2010 | 35 | 53 |
| 2011 | 40 | 49 |
| 2012 | 48 | 49 |
| 2013 | 40 | 48 |
| 2014 | 48 | 65 |
| 2015 | 57 | 69 |
| 2016 | 50 | 88 |
| 2017 | 57 | 66 |
| 2018 | 68 | 89 |
| 2019 | 68 | 75 |
| 2020 | 94 | 84 |
| 2021 | 86 | 49 |
| 2022 | 59 | 49 |
| 2023 | 43 | 32 |
| 2024 | 43 | 38 |
| 2025 | 32 | 26 |
| 2026 | 16 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01M 2013/0422Separating oil and gas with a centrifuge deviceIndexing code427
- F01M 2013/0438With a filterIndexing code361
- F01M 13/0416Arranged in valve-covers244
- F01M 2013/0433With a deflection deviceIndexing code215
- F01M 2013/0461With a labyrinthIndexing code137
- F01M 2013/0488With oil trap in the return conduit to the crankcaseIndexing code109
- F01M 13/0405Arranged in covering members apertures78
- F01M 2013/0472Using heating meansIndexing code60
All 15 subgroupsShow fewer
- F01M 2013/0455With a de-icing or defrosting systemIndexing code40
- F01M 2013/0466With electrostatic meansIndexing code30
- F01M 2013/0477By separating water or moistureIndexing code29
- F01M 2013/045Using compression or decompression of the gasIndexing code26
- F01M 2013/0444With means for accommodating movement or position of enginesIndexing code12
- F01M 2013/0411Using cooling meansIndexing code11
- F01M 2013/0483Using catalysisIndexing code11
Recent patents
- Systems and methods for rotating coalescers maintaining positive recirculation through a dynamic seal6 Oct 2026US 12,752,228 B2Atmus Filtration IP Inc.
- Crankcase oil separation device for internal combustion engine6 Oct 2026US 12,752,229 B2Caterpillar Inc.
- Air-fluid separator6 Oct 2026US 12,753,712 B2Improved Racing Products, LLC
- Crankcase ventilation element29 Sep 2026US 12,747,684 B2Atmus Filtration Inc.
- Crankcase pressure regulator having umbrella style valve8 Sep 2026US 12,729,637 B2Solberg Mfg., Inc.
- Oil separator structure for blow-by gas recirculation system, and vehicle1 Oct 2026US 2026/0295464 A1Isuzu Motors Limited
- Breather chamber structure of internal combustion engine24 Sep 2026US 2026/0286871 A1Honda Motor Co., Ltd.
- Oil separation device and array for internal combustion engine17 Sep 2026US 2026/0275890 A1Caterpillar Inc.
- System and control method13 Aug 2026US 2026/0235056 A1Komatsu Ltd.
- Internal Combustion Engine for a Motor Vehicle13 Aug 2026US 2026/0235057 A1Bayerische Motoren Werke Aktiengesellschaft
Most cited
By later US patents
- Free jet centrifuge rotor133US 6,530,872 B2Filterwerk Mann & Hummel GmbH · 2003
- Aerosol separator and method128US 5,853,439 ADonaldson Company, Inc. · 1998
- Aerosol separator; and method111US 6,171,355 B2Donaldson Company, Inc. · 2001
- Crankcase emission control system100US 5,564,401 ADiesel Research Inc. · 1996
- Oil separator for recycled blow-by gas99US 4,627,406 AKabushiki Kaisha Tsuchiya Seisakusho · 1986