F25B 2600/05
Refrigerant levels
F25B2600/05 (Refrigerant levels) appears on 110 US grants and 135 published applications in this corpus.
Search patents in F25B- Granted patents
- 110
- Published applications
- 135
- Assignees
- 57
- Inventors
- 267
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 3 | 1 |
| 2004 | 3 | 5 |
| 2005 | 2 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 2 | 2 |
| 2010 | 3 | 4 |
| 2011 | 2 | 2 |
| 2012 | 0 | 6 |
| 2013 | 3 | 5 |
| 2014 | 1 | 3 |
| 2015 | 4 | 6 |
| 2016 | 8 | 3 |
| 2017 | 6 | 7 |
| 2018 | 4 | 5 |
| 2019 | 6 | 9 |
| 2020 | 9 | 21 |
| 2021 | 7 | 17 |
| 2022 | 9 | 10 |
| 2023 | 13 | 7 |
| 2024 | 9 | 10 |
| 2025 | 6 | 5 |
| 2026 | 4 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Adjustable working fluid reservoir for HVAC system6 Oct 2026US 12,753,942 B2Tyco Fire & Security GmbH
- Heat pump having a charge management receiver24 Feb 2026US 12,560,363 B2Trane International Inc.
- Method of evaluating refrigerant charge within a refrigeration circuit10 Feb 2026US 12,546,520 B2Carrier Corporation
- Free cooling operation of a chiller3 Feb 2026US 12,540,765 B2Tyco Fire & Security GmbH
- Air conditioner and controlling method thereof7 Oct 2025US 12,435,894 B2Samsung Electronics Co., Ltd.
- Refrigeration cycle apparatus10 Jul 2025US 2025/0224165 A1Daikin Industries, Ltd.
- Refrigerant amount determination system3 Jul 2025US 2025/0216133 A1Mitsubishi Electric Corporation
- Estimating refrigeration capacity by measuring air temperature difference and/or airflow3 Jul 2025US 2025/0216135 A1John Bean Technologies Corporation
- Refrigeration System with Efficient Expansion Device Control, Liquid Refrigerant Return, Oil Return, and Evaporator Defrost15 May 2025US 2025/0155170 A1Hill Phoenix, Inc.
- Systems and Methods for Flash Tank Liquid Level Control13 Mar 2025US 2025/0085039 A1Rheem Manufacturing Company
Most cited
By later US patents
- High pressure regulation in economized vapor compression cycles59US 6,385,980 B1Carrier Corporation · 2002
- Method and apparatus for optimizing refrigeration systems58US 8,046,107 B2Hudson Technologies, Inc. · 2011
- Cost-effective remote monitoring, diagnostic and system health prediction system and method for vapor compression and heat pump units based on compressor discharge line temperature sampling54US 9,168,315 B1Mainstream Engineering Corporation · 2015
- Transcritical vapor compression cycle device with a variable high side volume element41US 5,497,631 ASinvent A/S · 1996
- Vapor compression type refrigerating system34US 6,044,655 ADenso Corporation · 2000