F25B
Refrigeration machines, plants or systems
Official title: Refrigeration machines, plants or systems; combined heating and refrigeration systems; heat pump systems
F25B (Refrigeration machines, plants or systems) appears on 27,746 US grants and 27,271 published applications in this corpus.
Search patents in F25B- Granted patents
- 27,746
- Published applications
- 27,271
- Assignees
- 6,341
- Inventors
- 39,655
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 183 | 0 |
| 1977 | 215 | 0 |
| 1978 | 186 | 0 |
| 1979 | 171 | 0 |
| 1980 | 232 | 0 |
| 1981 | 294 | 0 |
| 1982 | 285 | 0 |
| 1983 | 224 | 0 |
| 1984 | 312 | 0 |
| 1985 | 322 | 0 |
| 1986 | 237 | 0 |
| 1987 | 254 | 0 |
| 1988 | 258 | 0 |
| 1989 | 307 | 0 |
| 1990 | 314 | 0 |
| 1991 | 383 | 0 |
| 1992 | 352 | 0 |
| 1993 | 424 | 0 |
| 1994 | 384 | 0 |
| 1995 | 327 | 0 |
| 1996 | 356 | 0 |
| 1997 | 367 | 0 |
| 1998 | 465 | 0 |
| 1999 | 502 | 0 |
| 2000 | 475 | 0 |
| 2001 | 573 | 137 |
| 2002 | 643 | 469 |
| 2003 | 613 | 570 |
| 2004 | 542 | 714 |
| 2005 | 438 | 871 |
| 2006 | 492 | 859 |
| 2007 | 481 | 716 |
| 2008 | 332 | 754 |
| 2009 | 284 | 752 |
| 2010 | 420 | 867 |
| 2011 | 394 | 845 |
| 2012 | 373 | 821 |
| 2013 | 456 | 1026 |
| 2014 | 499 | 1083 |
| 2015 | 661 | 1379 |
| 2016 | 806 | 1311 |
| 2017 | 1173 | 1453 |
| 2018 | 1176 | 1470 |
| 2019 | 1438 | 1543 |
| 2020 | 1368 | 1620 |
| 2021 | 1210 | 1457 |
| 2022 | 1266 | 1504 |
| 2023 | 1151 | 1319 |
| 2024 | 1258 | 1466 |
| 2025 | 1142 | 1258 |
| 2026 | 728 | 1007 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F25B 49/00Arrangement or mounting of control or safety devices6,436
- F25B 2400/00Component parts or details not otherwise provided for in this subclassIndexing code6,362
- F25B 2600/00Control issuesIndexing code5,976
- F25B 41/00Fluid-circulation arrangements5,389
- F25B 2700/00Sensing or detecting of parametersIndexing code4,406
- F25B 2500/00Problems to be solvedIndexing code4,287
- F25B 9/00Compression machines, plants or systems, in which the refrigerant is air or3,875
- F25B 13/00Compression machines, plants or systems, with reversible cycle3,565
All 43 main groupsShow fewer
- F25B 39/00Evaporators3,120
- F25B 1/00Compression machines, plants or systems with non-reversible cycle2,970
- F25B 21/00Machines, plants or systems, using electric or magnetic effects2,731
- F25B 2313/00Compression machines, plants or systems with reversible cycle not otherwise provided forIndexing code2,294
- F25B 31/00Compressor arrangements2,159
- F25B 5/00Compression machines, plants or systems, with several evaporator circuits2,024
- F25B 2339/00Details of evaporatorsIndexing code1,958
- F25B 43/00Arrangements for separating or purifying gases or liquids1,886
- F25B 2309/00Gas cycle refrigeration machinesIndexing code1,753
- F25B 40/00Subcoolers, desuperheaters or superheaters1,749
- F25B 25/00Machines, plants or systems, using a combination of modes of operation covered1,603
- F25B 2321/00Details of machines, plants or systems, using electric or magnetic effectsIndexing code1,486
- F25B 45/00Arrangements for charging or discharging refrigerant1,454
- F25B 47/00Arrangements for preventing or removing deposits or corrosion, not provided for in1,373
- F25B 27/00Machines, plants or systems, using particular sources of energy1,360
- F25B 30/00Heat pumps1,349
- F25B 29/00Combined heating and refrigeration systems920
- F25B 2341/00Details of ejectors not being used as compression deviceIndexing code911
- F25B 15/00Sorption machines, plants or systems, operating continuously885
- F25B 2345/00Details for charging or discharging refrigerantsIndexing code872
- F25B 6/00Compression machines, plants or systems, with several condenser circuits849
- F25B 17/00Sorption machines, plants or systems, operating intermittently632
- F25B 7/00Compression machines, plants or systems, with cascade operation, i.e. with two or596
- F25B 23/00Machines, plants or systems, with a single mode of operation not covered526
- F25B 19/00Machines, plants or systems, using evaporation of a refrigerant but without recovery292
- F25B 11/00Compression machines, plants or systems, using turbines254
- F25B 2327/00Compressor driving meansIndexing code207
- F25B 2347/00Details for preventing or removing deposits or corrosionIndexing code173
- F25B 2315/00Sorption refrigeration cycles or details thereofIndexing code167
- F25B 35/00Boiler-absorbers, i.e. boilers usable for absorption or adsorption165
- F25B 37/00Absorbers159
- F25B 33/00Boilers155
- F25B 2333/00Details of boilersIndexing code104
- F25B 3/00Self-contained rotary compression machines, i.e. with compressor, condenser and evaporator rotating as100
- F25B 2300/00Special arrangements or features for refrigeration machines, plants or systems, combined heatingIndexing code26
Recent patents
- Method of controlling the environment in a grow room6 Oct 2026US 12,751,465 B2JDS Consulting
- Refrigeration cycle device6 Oct 2026US 12,752,599 B2Denso Corporation
- Single-phase field-oriented control for a linear compressor6 Oct 2026US 12,753,752 B1Haier US Appliance Solutions, Inc.
- Rotary compressor and refrigeration cycle device having the same6 Oct 2026US 12,753,760 B2LG Electronics Inc.
- Schrader valve adapter and optimizer6 Oct 2026US 12,753,852 B2Fieldpiece Instruments, Inc.
- Tempering device for controlling the temperature of a living being8 Oct 2026US 2026/0306315 A1Kohlbrat & Bunz Gesellschaft mbH
- 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.
- Self-cleaning system for a heat pump dryer8 Oct 2026US 2026/0308834 A1Whirlpool Corporation
- Ambient temperature thermal adapter for supercritical carbon dioxide power cycle8 Oct 2026US 2026/0309058 A1TerraPower, LLC
- Lubricant pump system for hvac&r system8 Oct 2026US 2026/0309136 A1Tyco Fire & Security GmbH
Most cited
By later US patents
- Electroactive polymer devices1,577US 6,545,384 B1SRI International · 2003
- Electronically commutated motor1,555US 4,169,990 AGeneral Electric Company · 1979
- Electronically commutated motor systems and control therefor813US 4,459,519 AGeneral Electric Company · 1984
- Refrigeration monitor unit797US 6,453,687 B2Robertshaw Controls Company · 2002
- Refrigerator and defrosting heater472US 6,684,659 B1Matsushita Refrigeration Company · 2004