F02M 31/087
Heat-exchange arrangements between the air intake and exhaust gas passages
Official title: Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages
F02M31/087 (Heat-exchange arrangements between the air intake and exhaust gas passages) appears on 139 US grants and 50 published applications in this corpus.
Search patents in F02M- Granted patents
- 139
- Published applications
- 50
- Assignees
- 52
- Inventors
- 188
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 13 | 0 |
| 1978 | 14 | 0 |
| 1979 | 7 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 2 |
| 2004 | 2 | 3 |
| 2005 | 5 | 1 |
| 2006 | 1 | 3 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 3 | 1 |
| 2010 | 0 | 2 |
| 2011 | 1 | 4 |
| 2012 | 1 | 3 |
| 2013 | 2 | 1 |
| 2014 | 3 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 2 |
| 2017 | 7 | 8 |
| 2018 | 3 | 4 |
| 2019 | 4 | 4 |
| 2020 | 2 | 2 |
| 2021 | 4 | 1 |
| 2022 | 3 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Reconfigurable surgical frame and method for use thereof26 May 2026US 12,637,993 B2Warsaw Orthopedic, Inc.
- Reconfigurable surgical frame and method for use thereof22 Oct 2024US 12,123,381 B2Warsaw Orthopedic, Inc.
- Reconfigurable surgical frame and method for use thereof11 Apr 2023US 11,624,342 B2Warsaw Orthopedic, Inc.
- Fully flexible, self-optimizing, digital hydraulic engines and methods with preheat6 Dec 2022US 11,519,321 B2Sturman Digital Systems, LLC
- Apparatus and method to improve vaporization of fuel in internal combustion engines20 Sep 2022US 11,448,166 B2Watt If Consulting and Developing LLC
- Reconfigurable surgical frame and method for use thereof3 Apr 2025US 2025/0109725 A1Warsaw Orthopedic, Inc.
- Split cycle internal combustion engine and methods of operating a split cycle internal combustion engine7 Nov 2024US 2024/0369012 A1
- Reconfigurable surgical frame and method for use thereof3 Aug 2023US 2023/0243323 A1Warsaw Orthopedic, Inc.
- Apparatus and method to improve vaporization of fuel in internal combustion engines24 Mar 2022US 2022/0090564 A1Watt If Consulting and Developing LLC
- Reconfigurable surgical frame and method for use thereof13 May 2021US 2021/0140395 A1Warsaw Orthopedic, Inc.
Most cited
By later US patents
- Reconfigurable surgical frame and method for use thereof36US 10,900,448 B2Warsaw Orthopedic, Inc. · 2021
- Intake control apparatus of engine25US 4,257,384 AYamaha Hatsukoki Kabushiki Kaisha · 1981
- High-efficiency Otto cycle engine with power generating expander25US 6,817,182 B22004
- Apparatus and operating method for an internal combustion engine23US 4,592,329 AMOTORTECH GmbH · 1986
- Internal combustion engine with preheating of the intake air, and method of operating the engine23US 5,076,248 A1991