F05C 2251/042
Expansivity
F05C2251/042 (Expansivity) appears on 345 US grants and 119 published applications in this corpus.
Search patents in F05C- Granted patents
- 345
- Published applications
- 119
- Assignees
- 191
- Inventors
- 650
- Latest grant
- 21 Oct 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 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 15 | 0 |
| 1986 | 5 | 0 |
| 1987 | 9 | 0 |
| 1988 | 12 | 0 |
| 1989 | 18 | 0 |
| 1990 | 15 | 0 |
| 1991 | 19 | 0 |
| 1992 | 10 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 12 | 0 |
| 1996 | 8 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 11 | 0 |
| 2000 | 19 | 0 |
| 2001 | 14 | 2 |
| 2002 | 13 | 9 |
| 2003 | 9 | 3 |
| 2004 | 9 | 9 |
| 2005 | 5 | 7 |
| 2006 | 2 | 7 |
| 2007 | 4 | 4 |
| 2008 | 2 | 3 |
| 2009 | 3 | 4 |
| 2010 | 3 | 8 |
| 2011 | 4 | 2 |
| 2012 | 0 | 4 |
| 2013 | 0 | 4 |
| 2014 | 4 | 5 |
| 2015 | 3 | 6 |
| 2016 | 6 | 4 |
| 2017 | 5 | 7 |
| 2018 | 4 | 8 |
| 2019 | 11 | 5 |
| 2020 | 3 | 2 |
| 2021 | 1 | 5 |
| 2022 | 5 | 4 |
| 2023 | 6 | 3 |
| 2024 | 4 | 2 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- 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
- Low coefficient of expansion rotors for vacuum boosters3 Dec 2024US 12,158,146 B2Industrial Technologies and Services, LLC
- Insulation layer on steel pistons8 Oct 2024US 12,110,837 B2Tenneco Inc.
- Low coefficient of expansion rotors for blowers10 Sep 2024US 12,085,078 B2Industrial Technologies and Services, LLC
- Positive-displacement machine according to the spiral principle4 Sep 2025US 2025/0277489 A1
- Low coefficient of expansion rotors for vacuum boosters20 Mar 2025US 2025/0092873 A1
- Low coefficient of expansion rotors for blowers26 Dec 2024US 2024/0426299 A1Industrial Technologies and Services, LLC
- Asymmetric gas bearing bushing for thermo-pump10 Oct 2024US 2024/0337259 A1KLA Corporation
- Low coefficient of expansion rotors for blowers16 Nov 2023US 2023/0366399 A1Industrial Technologies and Services, LLC
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
- Ceramic materials to be insert-cast58US 5,055,435 ANGK Insulators, Ltd. · 1991