F04C 29/026
Lubricant separation
Official title: {Lubricant separation}
F04C29/026 (Lubricant separation) appears on 522 US grants and 520 published applications in this corpus.
Search patents in F04C- Granted patents
- 522
- Published applications
- 520
- Assignees
- 205
- Inventors
- 1,193
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 7 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 7 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 7 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 11 | 0 |
| 2001 | 10 | 3 |
| 2002 | 9 | 15 |
| 2003 | 14 | 12 |
| 2004 | 11 | 21 |
| 2005 | 7 | 11 |
| 2006 | 13 | 17 |
| 2007 | 7 | 11 |
| 2008 | 5 | 12 |
| 2009 | 10 | 22 |
| 2010 | 8 | 19 |
| 2011 | 14 | 11 |
| 2012 | 17 | 18 |
| 2013 | 10 | 14 |
| 2014 | 10 | 17 |
| 2015 | 14 | 23 |
| 2016 | 13 | 15 |
| 2017 | 22 | 26 |
| 2018 | 14 | 30 |
| 2019 | 15 | 28 |
| 2020 | 31 | 42 |
| 2021 | 29 | 23 |
| 2022 | 30 | 24 |
| 2023 | 30 | 37 |
| 2024 | 44 | 29 |
| 2025 | 32 | 19 |
| 2026 | 18 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electric compressor8 Sep 2026US 12,729,688 B2Hanon Systems
- Compressor including improved oil trap and home appliance including the compressor28 Jul 2026US 12,692,867 B2Samsung Electronics Co., Ltd.
- Liquid separation device for a compressor system and compressor system having such a liquid separation device14 Jul 2026US 12,680,546 B2Knorr-Bremse Systeme FüR Schienenfahrzeuge GmbH
- Scroll compressor and refrigeration apparatus including the same23 Jun 2026US 12,663,007 B2Daikin Industries, Ltd.
- Compressor apparatus and method of operating the same16 Jun 2026US 12,655,845 B2Kaeser Kompressoren SE
- Scroll compressor and air conditioner comprising same10 Sep 2026US 2026/0266291 A1Samsung Electronics Co., Ltd.
- Gas Compressor20 Aug 2026US 2026/0243258 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Electric compressor with integrated vapor injection circuit30 Jul 2026US 2026/0218703 A1Mahle International GmbH
- Air Compressor30 Jul 2026US 2026/0218705 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Electric compressor30 Jul 2026US 2026/0218706 A1Hanon Systems
Most cited
By later US patents
- Compressor unit and separator therefor245US 5,158,585 AHitachi, Ltd. · 1992
- Lubricating system for gas turbine engines and pump for such a system88US 4,714,139 AMTU Motoren- und Turbinen-Union Muenchen GmbH · 1987
- Vertical axis hermetic helical screw rotary compressor with discharge gas oil mist eliminator and dual transfer tube manifold for supplying liquid refrigerant and refrigerant vapor to the compression area74US 4,545,742 ADunham-Bush, Inc. · 1985
- Vehicle mounted gas well pumping unit65US 6,626,646 B22003
- Apparatus and methods for cooling and sealing rotary helical screw compressors56US 5,653,585 A1997