F25B 2500/23
High amount of refrigerant in the system
F25B2500/23 (High amount of refrigerant in the system) appears on 60 US grants and 74 published applications in this corpus.
Search patents in F25B- Granted patents
- 60
- Published applications
- 74
- Assignees
- 38
- Inventors
- 164
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 5 |
| 2015 | 2 | 5 |
| 2016 | 2 | 7 |
| 2017 | 5 | 6 |
| 2018 | 9 | 12 |
| 2019 | 9 | 4 |
| 2020 | 9 | 5 |
| 2021 | 2 | 5 |
| 2022 | 6 | 2 |
| 2023 | 3 | 4 |
| 2024 | 3 | 11 |
| 2025 | 4 | 5 |
| 2026 | 5 | 0 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Adjustable working fluid reservoir for HVAC system6 Oct 2026US 12,753,942 B2Tyco Fire & Security GmbH
- Cooling circuit for a system for supplying and cooling a gas6 Oct 2026US 12,753,961 B2Gaztransport Et Technigaz
- Flash tank overflow warning system14 Jul 2026US 12,680,744 B2Rheem Manufacturing Company
- Air conditioner and control method thereof28 Apr 2026US 12,613,058 B2Qingdao Hisense Hitachi Air-Conditioning Systems Co., Ltd.
- Method of evaluating refrigerant charge within a refrigeration circuit10 Feb 2026US 12,546,520 B2Carrier Corporation
- Heat source unit and refrigeration apparatus13 Nov 2025US 2025/0347447 A1Daikin Industries, Ltd.
- Intelligent charge compensation in a heat pump system5 Jun 2025US 2025/0180262 A1Allied Air Enterprises LLC
- Flash Tank Overflow Warning System6 Mar 2025US 2025/0075955 A1Rheem Manufacturing Company
- Cooling circuit for a system for supplying and cooling a gas13 Feb 2025US 2025/0052463 A1Gaztransport Et Technigaz
- Systems and methods for heat pump systems for charge management30 Jan 2025US 2025/0035353 A1Rheem Manufacturing Company
Most cited
By later US patents
- Heat-pump system with refrigerant charge diagnostics16US 9,765,979 B2Emerson Climate Technologies, Inc. · 2017
- Systems and methods for gathering data from and diagnosing the status of an air conditioner14US 8,322,151 B1Demand Side Environmental, LLC · 2012
- System for refrigerant charge verification using two condenser coil temperatures9US 9,803,902 B2Emerson Climate Technologies, Inc. · 2017
- HVAC refrigerant charging and relieving systems and methods4US 10,837,685 B2Johnson Controls Technology Company · 2020
- Redistributing refrigerant between an evaporator and a condenser of a vapor compression system4US 10,955,179 B2Johnson Controls Technology Company · 2021