F25B 45/00
Arrangements for charging or discharging refrigerant
F25B45/00 (Arrangements for charging or discharging refrigerant) appears on 1,454 US grants and 1,214 published applications in this corpus.
Search patents in F25B- Granted patents
- 1,454
- Published applications
- 1,214
- Assignees
- 486
- Inventors
- 2,196
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 2 | 0 |
| 1984 | 9 | 0 |
| 1985 | 10 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 19 | 0 |
| 1990 | 18 | 0 |
| 1991 | 44 | 0 |
| 1992 | 47 | 0 |
| 1993 | 60 | 0 |
| 1994 | 54 | 0 |
| 1995 | 33 | 0 |
| 1996 | 32 | 0 |
| 1997 | 24 | 0 |
| 1998 | 31 | 0 |
| 1999 | 22 | 0 |
| 2000 | 24 | 0 |
| 2001 | 29 | 3 |
| 2002 | 32 | 21 |
| 2003 | 20 | 14 |
| 2004 | 18 | 24 |
| 2005 | 18 | 37 |
| 2006 | 31 | 40 |
| 2007 | 19 | 16 |
| 2008 | 10 | 29 |
| 2009 | 16 | 48 |
| 2010 | 18 | 37 |
| 2011 | 27 | 33 |
| 2012 | 27 | 44 |
| 2013 | 24 | 64 |
| 2014 | 36 | 47 |
| 2015 | 37 | 77 |
| 2016 | 62 | 57 |
| 2017 | 51 | 81 |
| 2018 | 54 | 62 |
| 2019 | 76 | 79 |
| 2020 | 72 | 67 |
| 2021 | 57 | 67 |
| 2022 | 63 | 66 |
| 2023 | 54 | 36 |
| 2024 | 48 | 62 |
| 2025 | 56 | 52 |
| 2026 | 25 | 51 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Schrader valve adapter and optimizer6 Oct 2026US 12,753,852 B2Fieldpiece Instruments, Inc.
- Systems and methods for Refrigerant unit life cycle management22 Sep 2026US 12,742,564 B2Effecterra, Inc.
- Systems and methods for enhanced heat transfer loops22 Sep 2026US 12,742,575 B2Solvcor Technologies LLC
- Heat source unit and refrigerant handling method1 Sep 2026US 12,723,791 B2Daikin Industries, Ltd.
- Refrigerant handling device and refrigerant handling method1 Sep 2026US 12,723,792 B2Daikin Industries, Ltd.
- Method and apparatus for handling refrigerant17 Sep 2026US 2026/0276268 A1SK Innovation Co., Ltd.
- Method and apparatus for handling refrigerant17 Sep 2026US 2026/0276269 A1SK Innovation Co., Ltd.
- Method and apparatus for handling refrigerant17 Sep 2026US 2026/0276270 A1SK Innovation Co., Ltd.
- System and method for charging a phase change material (PCM) tank for pressure control at a flash tank27 Aug 2026US 2026/0251366 A1Lennox Industries Inc.
- Heat pump system and method for manufacturing heat pump device20 Aug 2026US 2026/0243471 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- System and method for diagnosing the operation of air conditioner systems131US 4,967,567 AMurray, Inc. · 1990
- Air conditioning system with variable condenser reheat for enhanced dehumidification125US 6,826,921 B1Lennox Industries Inc. · 2004
- Geothermal heat pump system116US 5,758,514 AEnvirotherm Heating & Cooling Systems, Inc. · 1998
- Refrigerant recovery system109US 5,875,638 ACopeland Corporation · 1999
- Refrigerant recovery and purification system106US 4,476,688 A1984