F25B 41/006
Optical fluid control arrangements
Official title: {optical fluid control arrangements}
F25B41/006 (Optical fluid control arrangements) appears on 41 US grants and 15 published applications in this corpus.
Search patents in F25B- Granted patents
- 41
- Published applications
- 15
- Assignees
- 28
- Inventors
- 76
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 1 |
| 2011 | 2 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 0 | 0 |
| 2023 | 2 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mitigating compressor liquid migration and/or floodback using suction temperature sensor and/or liquid level sensor23 Sep 2025US 12,422,177 B2Copeland Comfort Control LP
- Controls and related methods for mitigating liquid migration and/or floodback26 Sep 2023US 11,768,019 B2Copeland Comfort Control LP
- Heat cycle system10 Jan 2023US 11,548,267 B2AGC Inc.
- Inline acid detection apparatus for inhibition in an HVAC system21 Jul 2020US 10,718,555 B2
- Manifold sightglass for charging microchannel system12 Nov 2019US 10,473,373 B2Trane International Inc.
- Refrigeration cycle apparatus11 Jun 2026US 2026/0160462 A1Mitsubishi Electric Corporation
- Indirect refrigerant leak detection2 Oct 2025US 2025/0305737 A1Vertiv Corporation
- Controls and Related Methods for Mitigating Liquid Migration and/or Floodback16 Nov 2023US 2023/0366596 A1Copeland Comfort Control LP
- Controls and related methods for mitigating liquid migration and/or floodback28 Oct 2021US 2021/0333026 A1Emerson Electric Co.
- Inline acid detection apparatus for inhibition in an hvac system16 Apr 2020US 2020/0116401 A1
Most cited
By later US patents
- Liquid receiver61US 5,038,582 ACalsonic Corporation · 1991
- Sightless bubble detector58US 4,138,879 ATIF Instruments, Inc. · 1979
- Method and apparatus for efficiently controlling refrigeration and air conditioning systems52US 5,230,223 AEnvirosystems Incorporated · 1993
- In-line sight indicator44US 5,383,338 AEmerson Electric Co. · 1995
- Method and apparatus for rehabilitating refrigerant40US 4,480,446 A1984