F25B 2400/18
Refrigerant conversion
F25B2400/18 (Refrigerant conversion) appears on 94 US grants and 75 published applications in this corpus.
Search patents in F25B- Granted patents
- 94
- Published applications
- 75
- Assignees
- 47
- Inventors
- 162
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 7 | 2 |
| 2002 | 9 | 11 |
| 2003 | 8 | 6 |
| 2004 | 1 | 5 |
| 2005 | 2 | 6 |
| 2006 | 3 | 3 |
| 2007 | 2 | 2 |
| 2008 | 3 | 1 |
| 2009 | 3 | 3 |
| 2010 | 2 | 3 |
| 2011 | 0 | 6 |
| 2012 | 3 | 4 |
| 2013 | 4 | 6 |
| 2014 | 6 | 3 |
| 2015 | 3 | 2 |
| 2016 | 4 | 1 |
| 2017 | 1 | 1 |
| 2018 | 5 | 1 |
| 2019 | 1 | 3 |
| 2020 | 2 | 2 |
| 2021 | 1 | 0 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Inside air-conditioning device9 Jun 2026US 12,650,250 B2Daikin Industries, Ltd.
- Refrigerant with lubricating oil for replacement of R22 refrigerant31 May 2022US 11,345,840 B2R421A LLC
- Refrigeration apparatus10 May 2022US 11,326,819 B2Daikin Industries, Ltd.
- Low global warming potential refrigerants in liquid chillers18 May 2021US 11,008,493 B2Trane International Inc.
- Accumulator and oil separator24 Nov 2020US 10,845,106 B2Rheem Manufacturing Company
- Process for transitioning a synthetic refrigeration system to a co2 refrigeration system11 Jun 2026US 2026/0160453 A1Hussmann Corporation
- Heating systems for a refrigeration system2 Oct 2025US 2025/0305739 A1Thermo King Corporation
- Bottle cooling or heating device6 Mar 2025US 2025/0075971 A1Kaelo Technology Ltd
- Inside air-conditioning device21 Apr 2022US 2022/0120476 A1Daikin Industries, Ltd.
- Refrigerant with lubricating oil for replacement of r22 refrigerant22 Oct 2020US 2020/0332165 A1R421A LLC
Most cited
By later US patents
- Method of introducing refrigerants into refrigeration systems83US 6,516,837 B2Honeywell International Inc. · 2003
- Vapor line pressure control69US 6,092,378 ACarrier Corporation · 2000
- Method of retrofitting air conditioner and system therefor32US 6,089,032 AInterdynamics, Inc. · 2000
- Refrigerant-circulating system, and refrigerant compressor and refrigeration cycle employing the refrigerant compressor30US 6,189,322 B1Mitsubishi Denki Kabushiki Kaisha · 2001
- Heat transfer fluid replacing R-134a29US 10,035,938 B2Arkema France · 2018