F25B 2500/00
Problems to be solved
F25B2500/00 (Problems to be solved) appears on 4,287 US grants and 5,007 published applications in this corpus.
Search patents in F25B- Granted patents
- 4,287
- Published applications
- 5,007
- Assignees
- 1,205
- Inventors
- 8,449
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 8 | 0 |
| 1979 | 8 | 0 |
| 1980 | 11 | 0 |
| 1981 | 14 | 0 |
| 1982 | 9 | 0 |
| 1983 | 10 | 0 |
| 1984 | 13 | 0 |
| 1985 | 17 | 0 |
| 1986 | 11 | 0 |
| 1987 | 22 | 0 |
| 1988 | 20 | 0 |
| 1989 | 21 | 0 |
| 1990 | 23 | 0 |
| 1991 | 40 | 0 |
| 1992 | 30 | 0 |
| 1993 | 36 | 0 |
| 1994 | 33 | 0 |
| 1995 | 24 | 0 |
| 1996 | 26 | 0 |
| 1997 | 30 | 0 |
| 1998 | 42 | 0 |
| 1999 | 47 | 0 |
| 2000 | 46 | 0 |
| 2001 | 70 | 21 |
| 2002 | 95 | 80 |
| 2003 | 103 | 100 |
| 2004 | 94 | 156 |
| 2005 | 99 | 208 |
| 2006 | 104 | 194 |
| 2007 | 104 | 153 |
| 2008 | 67 | 155 |
| 2009 | 73 | 155 |
| 2010 | 99 | 112 |
| 2011 | 85 | 125 |
| 2012 | 65 | 121 |
| 2013 | 66 | 140 |
| 2014 | 57 | 122 |
| 2015 | 112 | 217 |
| 2016 | 110 | 195 |
| 2017 | 183 | 312 |
| 2018 | 228 | 293 |
| 2019 | 305 | 317 |
| 2020 | 280 | 330 |
| 2021 | 240 | 267 |
| 2022 | 254 | 306 |
| 2023 | 257 | 263 |
| 2024 | 259 | 282 |
| 2025 | 219 | 214 |
| 2026 | 110 | 169 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F25B 2500/01Geometry problemsIndexing code769
- F25B 2500/19Calculation of parametersIndexing code700
- F25B 2500/22Preventing, detecting or repairing leaks of refrigeration fluidsIndexing code542
- F25B 2500/26Problems to be solved: characterised by the startup of the refrigeration cycleIndexing code437
- F25B 2500/18OptimizationIndexing code381
- F25B 2500/12SoundIndexing code325
- F25B 2500/13VibrationsIndexing code311
- F25B 2500/06DamageIndexing code296
All 29 subgroupsShow fewer
- F25B 2500/16LubricationIndexing code221
- F25B 2500/31Low ambient temperaturesIndexing code217
- F25B 2500/28Means for preventing liquid refrigerant entering into the compressorIndexing code152
- F25B 2500/07Exceeding a certain pressure value in a refrigeration component or cycleIndexing code138
- F25B 2500/27Problems to be solved: characterised by the stop of the refrigeration cycleIndexing code138
- F25B 2500/24Low amount of refrigerant in the systemIndexing code123
- F25B 2500/05Cost reductionIndexing code95
- F25B 2500/08Exceeding a certain temperature value in a refrigeration component or cycleIndexing code77
- F25B 2500/09Improving heat transfersIndexing code62
- F25B 2500/23High amount of refrigerant in the systemIndexing code60
- F25B 2500/29High ambient temperaturesIndexing code53
- F25B 2500/04CloggingIndexing code50
- F25B 2500/17Size reductionIndexing code44
- F25B 2500/02Increasing the heating capacity of a reversible cycle during cold outdoor conditionsIndexing code43
- F25B 2500/15Hunting, i.e. oscillation of controlled refrigeration variables reaching undesirable valuesIndexing code42
- F25B 2500/14The presence of moisture in a refrigeration component or cycleIndexing code33
- F25B 2500/11Reducing heat transfersIndexing code30
- F25B 2500/32WeightIndexing code19
- F25B 2500/21Reduction of partsIndexing code17
- F25B 2500/03CavitationsIndexing code8
- F25B 2500/25Standardisation of apparatus or partsIndexing code4
Recent patents
- Adjustable working fluid reservoir for HVAC system6 Oct 2026US 12,753,942 B2Tyco Fire & Security GmbH
- Heat source unit6 Oct 2026US 12,753,956 B2Daikin Industries, Ltd.
- Cooling circuit for a system for supplying and cooling a gas6 Oct 2026US 12,753,961 B2Gaztransport Et Technigaz
- Valve manifold for a pool environment control system29 Sep 2026US 12,747,602 B2PoolAire, Inc.
- Refrigerant circulation system29 Sep 2026US 12,747,898 B2Mazda Motor Corporation
- Utilizing air moisture sensor and compressor power sensor data within a laundry appliance to detect refrigerant leaks8 Oct 2026US 2026/0308832 A1Haier US Appliance Solutions, Inc.
- Refrigerant unit8 Oct 2026US 2026/0309374 A1Sanden Corporation
- Multi-type air-conditioning device8 Oct 2026US 2026/0309383 A1
- HVAC Cap Assembly1 Oct 2026US 2026/0298391 A1
- Cryogenic cooling system1 Oct 2026US 2026/0298507 A1Oxford NanoScience Limited
Most cited
By later US patents
- Remote data acquisition system and method254US 6,823,680 B2Copeland Corporation · 2004
- Monitoring refrigerant in a refrigeration system192US 7,752,853 B2Emerson Retail Services, Inc. · 2010
- Efficiency thermoelectrics utilizing thermal isolation179US 6,539,725 B2Bsst LLC · 2003
- Air-conditioning servicing system and method162US 6,324,854 B1Copeland Corporation · 2001
- Air filter monitoring system159US 7,244,294 B22007