F25B 2309/00
Gas cycle refrigeration machines
F25B2309/00 (Gas cycle refrigeration machines) appears on 1,753 US grants and 1,763 published applications in this corpus.
Search patents in F25B- Granted patents
- 1,753
- Published applications
- 1,763
- Assignees
- 600
- Inventors
- 2,769
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 8 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 13 | 0 |
| 1982 | 10 | 0 |
| 1983 | 18 | 0 |
| 1984 | 13 | 0 |
| 1985 | 12 | 0 |
| 1986 | 12 | 0 |
| 1987 | 6 | 0 |
| 1988 | 10 | 0 |
| 1989 | 16 | 0 |
| 1990 | 8 | 0 |
| 1991 | 12 | 0 |
| 1992 | 15 | 0 |
| 1993 | 19 | 0 |
| 1994 | 24 | 0 |
| 1995 | 23 | 0 |
| 1996 | 20 | 0 |
| 1997 | 23 | 0 |
| 1998 | 24 | 0 |
| 1999 | 32 | 0 |
| 2000 | 38 | 0 |
| 2001 | 60 | 20 |
| 2002 | 77 | 49 |
| 2003 | 74 | 85 |
| 2004 | 64 | 129 |
| 2005 | 74 | 143 |
| 2006 | 88 | 110 |
| 2007 | 79 | 107 |
| 2008 | 49 | 92 |
| 2009 | 39 | 66 |
| 2010 | 45 | 90 |
| 2011 | 29 | 69 |
| 2012 | 35 | 51 |
| 2013 | 47 | 55 |
| 2014 | 33 | 47 |
| 2015 | 42 | 53 |
| 2016 | 39 | 49 |
| 2017 | 46 | 64 |
| 2018 | 58 | 47 |
| 2019 | 63 | 69 |
| 2020 | 44 | 60 |
| 2021 | 44 | 54 |
| 2022 | 62 | 70 |
| 2023 | 55 | 51 |
| 2024 | 54 | 62 |
| 2025 | 44 | 33 |
| 2026 | 27 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F25B 2309/06Compression machines, plants or systems characterised by the refrigerant being carbon dioxideIndexing code855
- F25B 2309/14Compression machines, plants or systems characterised by the cycle usedIndexing code487
- F25B 2309/003Gas cycle refrigeration machines: characterised by construction or composition of the regeneratorIndexing code228
- F25B 2309/001Gas cycle refrigeration machines: with a linear configuration or a linear motorIndexing code171
- F25B 2309/02Gas cycle refrigeration machines: using the joule-thompson effectIndexing code88
- F25B 2309/006Gas cycle refrigeration machines: using a distributing valve of the rotary typeIndexing code50
- F25B 2309/002Gas cycle refrigeration machines: with parallel working cold producing expansion devices inIndexing code35
- F25B 2309/005Gas cycle refrigeration machines: using an expander of the rotary typeIndexing code22
All 9 subgroupsShow fewer
Recent patents
- Cryogenic cooling device6 Oct 2026US 12,753,953 B2Sumitomo Heavy Industries, Ltd.
- Hybrid double-inlet valve for pulse tube cryocooler6 Oct 2026US 12,753,954 B2Sumitomo (SHI) Cryogenics of America, Inc.
- CO2 refrigeration system with superheat control22 Sep 2026US 12,742,574 B2Hill Phoenix, Inc.
- Systems, controllers, and methods for controlling a CO2 refrigeration system15 Sep 2026US 12,736,262 B2Copeland Corporation
- Cryocooler and monitoring method for cryocooler8 Sep 2026US 12,729,894 B2Sumitomo Heavy Industries, Ltd.
- Cryocooler and monitoring method for cryocooler1 Oct 2026US 2026/0298517 A1Sumitomo Heavy Industries, Ltd.
- Systems and methods for controlling refrigerant concentration17 Sep 2026US 2026/0276278 A1Copeland Corporation
- Systems and methods for controlling refrigerant concentration17 Sep 2026US 2026/0276279 A1Copeland Corporation
- 3K Cold Head Regenerator Design10 Sep 2026US 2026/0266514 A1Bluefors Cryocooler Technologies Inc.
- Cryogenic Refrigeration Heat Exchange Systems and Methods3 Sep 2026US 2026/0258985 A1Boston Cryogenics LLC
Most cited
By later US patents
- Microcomponent chemical process sheet architecture299US 5,811,062 ABattelle Memorial Institute · 1998
- Cryo-probe244US 5,452,582 AAPD Cryogenics, Inc. · 1995
- Cryosurgical instrument238US 5,275,595 A1994
- Entrained cryogenic droplet transfer method and cryosurgical instrument201US 5,324,286 AArthur A. Fowle, Inc. · 1994
- Cryosurgical instrument193US 4,377,168 AWallach Surgical Instruments, Inc. · 1983