F25B 2309/06
Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
F25B2309/06 (Compression machines, plants or systems characterised by the refrigerant being carbon dioxide) appears on 855 US grants and 1,116 published applications in this corpus.
Search patents in F25B- Granted patents
- 855
- Published applications
- 1,116
- Assignees
- 291
- Inventors
- 1,486
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 15 | 0 |
| 2001 | 30 | 14 |
| 2002 | 39 | 34 |
| 2003 | 48 | 64 |
| 2004 | 41 | 94 |
| 2005 | 62 | 98 |
| 2006 | 56 | 78 |
| 2007 | 45 | 72 |
| 2008 | 33 | 64 |
| 2009 | 21 | 52 |
| 2010 | 39 | 78 |
| 2011 | 23 | 47 |
| 2012 | 28 | 37 |
| 2013 | 31 | 28 |
| 2014 | 23 | 24 |
| 2015 | 24 | 23 |
| 2016 | 25 | 23 |
| 2017 | 12 | 30 |
| 2018 | 32 | 19 |
| 2019 | 26 | 32 |
| 2020 | 18 | 24 |
| 2021 | 18 | 28 |
| 2022 | 20 | 40 |
| 2023 | 29 | 26 |
| 2024 | 32 | 39 |
| 2025 | 31 | 25 |
| 2026 | 16 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- System and method for making a building carbon neutral1 Sep 2026US 12,723,783 B2Carrier Corporation
- Using carbon dioxide from a direct air capture system as a low global warming car and industrial refrigerant25 Aug 2026US 12,716,620 B2AirMyne, Inc.
- Energy storage device and method based on carbon dioxide gas-liquid phase change25 Aug 2026US 12,716,659 B2Exa Energy Technology (Shenzhen) Co. 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
- Transcritical Heat Pump System30 Jul 2026US 2026/0218957 A1Nik Systems Engineering Services Ltd
- Mechanical relief protection of a co2 system for a power outage23 Jul 2026US 2026/0210586 A1Heatcraft Refrigeration Products LLC
- Quick co2 warm liquid defrost with additional heat23 Jul 2026US 2026/0210601 A1Heatcraft Refrigeration Products LLC
Most cited
By later US patents
- Transcritical turbine and method of operation107US 6,644,062 B1Energent Corporation · 2003
- Method and device for high side pressure regulation in transcritical vapor compression cycle91US 5,245,836 ASinvent AS · 1993
- Liquid secondary cooling system72US 6,467,279 B12002
- Cooling system employing a primary, high pressure closed refrigeration loop and a secondary refrigeration loop64US 5,524,442 APraxair Technology, Inc. · 1996
- Method and apparatus for converting thermal energy to mechanical energy63US 4,170,116 A1979