F25B 9/008
The refrigerant being carbon dioxide
Official title: {the refrigerant being carbon dioxide}
F25B9/008 (The refrigerant being carbon dioxide) appears on 925 US grants and 1,276 published applications in this corpus.
Search patents in F25B- Granted patents
- 925
- Published applications
- 1,276
- Assignees
- 365
- Inventors
- 1,782
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 12 | 0 |
| 2001 | 26 | 13 |
| 2002 | 29 | 25 |
| 2003 | 39 | 58 |
| 2004 | 35 | 88 |
| 2005 | 56 | 86 |
| 2006 | 54 | 67 |
| 2007 | 40 | 58 |
| 2008 | 29 | 55 |
| 2009 | 21 | 44 |
| 2010 | 31 | 55 |
| 2011 | 22 | 34 |
| 2012 | 24 | 25 |
| 2013 | 19 | 23 |
| 2014 | 16 | 24 |
| 2015 | 19 | 28 |
| 2016 | 21 | 34 |
| 2017 | 16 | 46 |
| 2018 | 36 | 51 |
| 2019 | 45 | 53 |
| 2020 | 34 | 46 |
| 2021 | 37 | 60 |
| 2022 | 46 | 60 |
| 2023 | 50 | 49 |
| 2024 | 54 | 73 |
| 2025 | 61 | 72 |
| 2026 | 33 | 49 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Refrigerant circulation system29 Sep 2026US 12,747,898 B2Mazda Motor Corporation
- 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
- Cooling system including hydraulic liquid-refrigerant compressors and expanders for delivering pressurized liquid to the compressors8 Sep 2026US 12,729,886 B2
- Refrigeration system with heat recovery8 Sep 2026US 12,729,895 B2Danfoss A/S
- Heat reclaim system24 Sep 2026US 2026/0287216 A1Hill Phoenix, Inc.
- Indirect thermal management system for new energy vehicles24 Sep 2026US 2026/0287222 A1
- Valve device for operation with a refrigerant3 Sep 2026US 2026/0258990 A1Hanon Systems
- Motor-operated valve and refrigeration cycle device20 Aug 2026US 2026/0243366 A1Fujikoki Corporation
- Heat pump system and method for manufacturing heat pump device20 Aug 2026US 2026/0243471 A1Mitsubishi Electric Corporation
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
- Carbon dioxide refrigeration cycle89US 9,062,898 B2Echogen Power Systems, LLC · 2015
- Method and apparatus for converting thermal energy to mechanical energy63US 4,170,116 A1979
- Method for extracting carbon dioxide for use as a refrigerant in a vapor compression system61US 6,925,821 B2Carrier Corporation · 2005