F25B 9/14
Compression machines, plants or systems, in which the refrigerant is air or
Official title: characterised by the cycle used, e.g. Stirling cycle
F25B9/14 (Compression machines, plants or systems, in which the refrigerant is air or) appears on 1,317 US grants and 1,134 published applications in this corpus.
Search patents in F25B- Granted patents
- 1,317
- Published applications
- 1,134
- Assignees
- 492
- Inventors
- 2,010
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 14 | 0 |
| 1982 | 10 | 0 |
| 1983 | 18 | 0 |
| 1984 | 16 | 0 |
| 1985 | 22 | 0 |
| 1986 | 13 | 0 |
| 1987 | 9 | 0 |
| 1988 | 11 | 0 |
| 1989 | 29 | 0 |
| 1990 | 16 | 0 |
| 1991 | 17 | 0 |
| 1992 | 27 | 0 |
| 1993 | 18 | 0 |
| 1994 | 30 | 0 |
| 1995 | 30 | 0 |
| 1996 | 23 | 0 |
| 1997 | 27 | 0 |
| 1998 | 23 | 0 |
| 1999 | 29 | 0 |
| 2000 | 27 | 0 |
| 2001 | 46 | 8 |
| 2002 | 52 | 24 |
| 2003 | 36 | 30 |
| 2004 | 33 | 42 |
| 2005 | 16 | 65 |
| 2006 | 42 | 54 |
| 2007 | 44 | 46 |
| 2008 | 25 | 46 |
| 2009 | 25 | 31 |
| 2010 | 7 | 24 |
| 2011 | 13 | 30 |
| 2012 | 12 | 32 |
| 2013 | 21 | 46 |
| 2014 | 17 | 49 |
| 2015 | 28 | 57 |
| 2016 | 29 | 41 |
| 2017 | 50 | 51 |
| 2018 | 42 | 47 |
| 2019 | 52 | 65 |
| 2020 | 47 | 56 |
| 2021 | 47 | 46 |
| 2022 | 61 | 52 |
| 2023 | 41 | 51 |
| 2024 | 39 | 53 |
| 2025 | 39 | 44 |
| 2026 | 22 | 44 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hybrid double-inlet valve for pulse tube cryocooler6 Oct 2026US 12,753,954 B2Sumitomo (SHI) Cryogenics of America, Inc.
- Cryocooler and monitoring method for cryocooler8 Sep 2026US 12,729,894 B2Sumitomo Heavy Industries, Ltd.
- Device for the suppression of acoustic streaming in thermoacoustic systems25 Aug 2026US 12,716,622 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Integrated heating system using a Stirling heat pump18 Aug 2026US 12,710,202 B2Trane International Inc.
- Stirling refrigeration system11 Aug 2026US 12,704,297 B2Carrier Corporation
- Cryopump8 Oct 2026US 2026/0309139 A1Sumitomo Heavy Industries, Ltd.
- Cryocooler and monitoring method for cryocooler1 Oct 2026US 2026/0298517 A1Sumitomo Heavy Industries, Ltd.
- Cryogenic cooling system and an insert therefor17 Sep 2026US 2026/0276149 A1Oxford NanoScience Limited
- Cryocooler17 Sep 2026US 2026/0276250 A1Sumitomo Heavy Industries, Ltd.
- 3K Cold Head Regenerator Design10 Sep 2026US 2026/0266514 A1Bluefors Cryocooler Technologies Inc.
Most cited
By later US patents
- Electroactive polymer devices1,577US 6,545,384 B1SRI International · 2003
- Electroactive polymers213US 6,812,624 B1SRI International · 2004
- Biologically powered electroactive polymer generators212US 6,768,246 B2SRI International · 2004
- Cryoelectronic receiver front end197US 6,104,934 ASpectral Solutions, Inc. · 2000
- Electroactive polymer devices for moving fluid149US 7,064,472 B2SRI International · 2006