F25B 31/002
Lubrication
Official title: {Lubrication}
F25B31/002 (Lubrication) appears on 977 US grants and 1,017 published applications in this corpus.
Search patents in F25B- Granted patents
- 977
- Published applications
- 1,017
- Assignees
- 295
- Inventors
- 2,049
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 14 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 9 | 0 |
| 1992 | 10 | 0 |
| 1993 | 8 | 0 |
| 1994 | 13 | 0 |
| 1995 | 14 | 0 |
| 1996 | 13 | 0 |
| 1997 | 16 | 0 |
| 1998 | 12 | 0 |
| 1999 | 30 | 0 |
| 2000 | 26 | 0 |
| 2001 | 30 | 3 |
| 2002 | 17 | 17 |
| 2003 | 22 | 16 |
| 2004 | 11 | 15 |
| 2005 | 9 | 31 |
| 2006 | 17 | 18 |
| 2007 | 9 | 11 |
| 2008 | 4 | 24 |
| 2009 | 5 | 24 |
| 2010 | 18 | 37 |
| 2011 | 14 | 22 |
| 2012 | 17 | 24 |
| 2013 | 17 | 32 |
| 2014 | 21 | 28 |
| 2015 | 24 | 55 |
| 2016 | 29 | 64 |
| 2017 | 43 | 81 |
| 2018 | 59 | 64 |
| 2019 | 72 | 60 |
| 2020 | 60 | 93 |
| 2021 | 55 | 70 |
| 2022 | 56 | 64 |
| 2023 | 44 | 50 |
| 2024 | 51 | 36 |
| 2025 | 37 | 45 |
| 2026 | 24 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Autocascade system with superheat control6 Oct 2026US 12,753,960 B2Trane International Inc.
- Operation control system, operation control apparatus, and operation control method25 Aug 2026US 12,716,601 B2Daikin Industries, Ltd.
- CO2 refrigeration system with convertible compressors25 Aug 2026US 12,716,621 B2Hill Phoenix, Inc.
- Lubrication system for a compressor18 Aug 2026US 12,710,203 B2Johnson Controls Industries SAS
- Heat transfer compositions, methods, and systems11 Aug 2026US 12,703,817 B2Solstice Advanced Materials US, Inc.
- Lubricant pump system for hvac&r system8 Oct 2026US 2026/0309136 A1Tyco Fire & Security GmbH
- Compressor with level sensor17 Sep 2026US 2026/0276263 A1Haier US Appliance Solutions, Inc.
- Oil distribution system for multiple-compressor systems20 Aug 2026US 2026/0243242 A1
- Outdoor unit for air conditioning and air conditioner20 Aug 2026US 2026/0243449 A1Carrier Japan Corporation
- Fluid supply system for bearings of hvac&r system13 Aug 2026US 2026/0235333 A1Tyco Fire & Security GmbH
Most cited
By later US patents
- Oil level control system129US 6,125,642 ASporlan Valve Company · 2000
- Method and apparatus for measuring and improving efficiency in refrigeration systems95US 6,505,475 B1Hudson Technologies, Inc. · 2003
- Air conditioner77US 5,369,958 AMitsubishi Denki Kabushiki Kaisha · 1994
- Refrigerant compressor and cooling apparatus comprising the same72US 6,035,661 ASanyo Electric Co., Ltd. · 2000
- Oil flow protection scheme71US 5,884,494 AAmerican Standard Inc. · 1999