F05C 2251/04
Thermal properties
F05C2251/04 (Thermal properties) appears on 472 US grants and 279 published applications in this corpus.
Search patents in F05C- Granted patents
- 472
- Published applications
- 279
- Assignees
- 242
- Inventors
- 1,007
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 8 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 16 | 0 |
| 1986 | 5 | 0 |
| 1987 | 9 | 0 |
| 1988 | 13 | 0 |
| 1989 | 19 | 0 |
| 1990 | 16 | 0 |
| 1991 | 19 | 0 |
| 1992 | 10 | 0 |
| 1993 | 9 | 0 |
| 1994 | 10 | 0 |
| 1995 | 15 | 0 |
| 1996 | 10 | 0 |
| 1997 | 9 | 0 |
| 1998 | 15 | 0 |
| 1999 | 12 | 0 |
| 2000 | 19 | 0 |
| 2001 | 15 | 3 |
| 2002 | 13 | 11 |
| 2003 | 10 | 4 |
| 2004 | 11 | 10 |
| 2005 | 6 | 12 |
| 2006 | 2 | 8 |
| 2007 | 5 | 10 |
| 2008 | 2 | 7 |
| 2009 | 6 | 5 |
| 2010 | 7 | 10 |
| 2011 | 5 | 5 |
| 2012 | 1 | 12 |
| 2013 | 0 | 12 |
| 2014 | 8 | 13 |
| 2015 | 10 | 19 |
| 2016 | 9 | 14 |
| 2017 | 15 | 28 |
| 2018 | 18 | 21 |
| 2019 | 25 | 17 |
| 2020 | 19 | 15 |
| 2021 | 7 | 12 |
| 2022 | 13 | 8 |
| 2023 | 8 | 10 |
| 2024 | 8 | 3 |
| 2025 | 7 | 6 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Internal combustion engine25 Nov 2025US 12,480,457 B2
- Asymmetric gas bearing bushing for thermo-pump21 Oct 2025US 12,448,963 B2KLA Corporation
- Low coefficient of expansion rotors for blowers21 Oct 2025US 12,448,968 B2Industrial Technologies and Services, LLC
- Internal combustion engine23 Sep 2025US 12,421,875 B2
- Rotary engine with seal having elastomeric member and shield23 Sep 2025US 12,421,912 B2Pratt & Whitney Canada Corp.
- Vacuum pump17 Sep 2026US 2026/0275984 A1
- Stators for Eccentric Screw Pumps, Eccentric Screw Pump and Production Method26 Feb 2026US 2026/0055761 A1NETZSCH Pumpen & Systeme GmbH
- Coating system22 Jan 2026US 2026/0022678 A1Volvo Truck Corporation
- Internal combustion engine8 Jan 2026US 2026/0009346 A1
- Positive-displacement machine according to the spiral principle4 Sep 2025US 2025/0277489 A1
Most cited
By later US patents
- Internal combustion engine102US 4,805,571 AHumphrey Cycle Engine Partners, L.P. · 1989
- Active energy absorbing cellular metals and method of manufacturing and using the same77US 7,288,326 B2University of Virginia Patent Foundation · 2007
- Controlling activation of devices76US 6,433,991 B1Schlumberger Technology Corporation · 2002
- Valve seat insert and cylinder head with the valve seat insert69US 4,763,876 ANGK Insulators, Ltd. · 1988
- Combustion chamber components for internal combustion engines60US 4,495,907 ACummins Engine Company, Inc. · 1985