F01M 13/00
Crankcase ventilating or breathing
F01M13/00 (Crankcase ventilating or breathing) appears on 2,080 US grants and 1,840 published applications in this corpus.
Search patents in F01M- Granted patents
- 2,080
- Published applications
- 1,840
- Assignees
- 567
- Inventors
- 3,578
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 11 | 0 |
| 1979 | 10 | 0 |
| 1980 | 11 | 0 |
| 1981 | 16 | 0 |
| 1982 | 8 | 0 |
| 1983 | 9 | 0 |
| 1984 | 5 | 0 |
| 1985 | 17 | 0 |
| 1986 | 19 | 0 |
| 1987 | 21 | 0 |
| 1988 | 18 | 0 |
| 1989 | 17 | 0 |
| 1990 | 20 | 0 |
| 1991 | 18 | 0 |
| 1992 | 18 | 0 |
| 1993 | 15 | 0 |
| 1994 | 13 | 0 |
| 1995 | 14 | 0 |
| 1996 | 26 | 0 |
| 1997 | 19 | 0 |
| 1998 | 22 | 0 |
| 1999 | 28 | 0 |
| 2000 | 47 | 0 |
| 2001 | 36 | 24 |
| 2002 | 45 | 41 |
| 2003 | 51 | 46 |
| 2004 | 46 | 51 |
| 2005 | 33 | 40 |
| 2006 | 40 | 43 |
| 2007 | 39 | 51 |
| 2008 | 37 | 54 |
| 2009 | 36 | 84 |
| 2010 | 45 | 75 |
| 2011 | 54 | 80 |
| 2012 | 67 | 68 |
| 2013 | 64 | 68 |
| 2014 | 67 | 105 |
| 2015 | 87 | 106 |
| 2016 | 82 | 122 |
| 2017 | 88 | 103 |
| 2018 | 110 | 125 |
| 2019 | 96 | 106 |
| 2020 | 140 | 124 |
| 2021 | 121 | 74 |
| 2022 | 89 | 77 |
| 2023 | 65 | 42 |
| 2024 | 59 | 54 |
| 2025 | 49 | 41 |
| 2026 | 21 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01M 13/04Crankcase ventilating or breathing: having means for purifying air before leaving crankcase1,422
- F01M 13/02Crankcase ventilating or breathing: by means of additional source of positive or689
- F01M 13/0011Breather valves342
- F01M 2013/0038Layout of crankcase breathing systemsIndexing code267
- F01M 2013/0077Engine parameters used for crankcase breather systemsIndexing code87
- F01M 2013/0005Crankcase ventilating or breathing: with systems regulating the pressure in the carterIndexing code35
- F01M 13/0033Breather inlet-air filters26
- F01M 13/06Crankcase ventilating or breathing: specially adapted for submersible engines2
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
- Dry sump engine29 Sep 2026US 12,747,683 B2Toyota Jidosha Kabushiki Kaisha
- Crankcase ventilation element29 Sep 2026US 12,747,684 B2Atmus Filtration Inc.
- Oil separator structure for blow-by gas recirculation system, and vehicle1 Oct 2026US 2026/0295464 A1Isuzu Motors Limited
- Ventilation Structure for a Crankcase1 Oct 2026US 2026/0298116 A1Zhejiang Qianjiang Motorcycle Co., Ltd.
- Breather chamber structure of internal combustion engine24 Sep 2026US 2026/0286871 A1Honda Motor Co., Ltd.
- Ventilation system17 Sep 2026US 2026/0275889 A1Toyota Jidosha Kabushiki Kaisha
- Oil separation device and array for internal combustion engine17 Sep 2026US 2026/0275890 A1Caterpillar Inc.
Most cited
By later US patents
- Air cleaner; replaceable filter cartridges; and, methods141US 7,070,642 B2Donaldson Company, Inc. · 2006
- 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