F25B 2700/21155
Of the oil
Official title: of the oil
F25B2700/21155 (Of the oil) appears on 43 US grants and 41 published applications in this corpus.
Search patents in F25B- Granted patents
- 43
- Published applications
- 41
- Assignees
- 23
- Inventors
- 95
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 5 |
| 2016 | 1 | 4 |
| 2017 | 0 | 4 |
| 2018 | 7 | 1 |
| 2019 | 5 | 5 |
| 2020 | 5 | 4 |
| 2021 | 1 | 2 |
| 2022 | 4 | 3 |
| 2023 | 3 | 3 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Refrigeration device and compression device26 May 2026US 12,638,218 B2Daikin Industries, Ltd.
- Temperature management system30 Dec 2025US 12,510,008 B2SPH Sustainable Process Heat GmbH
- Method for managing a heat pump operating with a low environmental impact operating fluid13 Aug 2024US 12,061,026 B2
- Control unit for a refrigerant compressor21 May 2024US 11,988,429 B2BITZER Kuehlmaschinenbau GmbH
- In-situ oil circulation ratio measurement system for vapor compression cycle systems21 Nov 2023US 11,821,663 B2Purdue Research Foundation
- Air conditioner10 Oct 2024US 2024/0337422 A1Mitsubishi Electric Corporation
- Oil management in multi-compressor system12 Oct 2023US 2023/0324092 A1Carrier Corporation
- Refrigeration device and compression device27 Jul 2023US 2023/0235925 A1Daikin Industries, Ltd.
- Temperature management system18 May 2023US 2023/0151744 A1SPH Sustainable Process Heat GmbH
- Method for managing a heat pump operating with a low environmental impact operating fluid29 Sep 2022US 2022/0307746 A1ARISTON THERMO S.p.A.
Most cited
By later US patents
- Solid state compressor control system114US 4,227,862 AFrick Company · 1980
- Solid state compressor control system80US 4,336,001 AFrick Company · 1982
- Heat pump system57US 4,498,310 AMitsubishi Denki Kabushiki Kaisha · 1985
- Crankcase heater control for hermetic refrigerant compressors38US 5,012,652 ACarrier Corporation · 1991
- Apparatus and method of oil charge loss protection for compressors30US 5,347,821 AAmerican Standard Inc. · 1994