F04C 2220/20
Pumps with means for separating and evacuating the gaseous phase
F04C2220/20 (Pumps with means for separating and evacuating the gaseous phase) appears on 29 US grants and 25 published applications in this corpus.
Search patents in F04C- Granted patents
- 29
- Published applications
- 25
- Assignees
- 25
- Inventors
- 54
- Latest grant
- 25 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 3 |
| 2016 | 0 | 0 |
| 2017 | 1 | 2 |
| 2018 | 3 | 1 |
| 2019 | 2 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Energy transfer machine for corrosive fluids25 Mar 2025US 12,258,967 B2Genesis Advanced Technology Inc.
- Scroll compressor and air conditioner having same25 Jun 2024US 12,018,682 B2LG Electronics Inc.
- Energy transfer machine for corrosive fluids23 Apr 2024US 11,965,509 B2Genesis Advanced Technology Inc.
- Rotary pump with discharge control28 Nov 2023US 11,828,181 B2
- Complete bearing-sealed root vacuum pump system capable of promoting vacuum ability of condenser of power plant4 Apr 2023US 11,619,231 B1Elvac Co., Ltd
- Multiphase pumping system12 Feb 2026US 2026/0043401 A1Circor Pumps North America, LLC
- Energy transfer machine for corrosive fluids15 Aug 2024US 2024/0271618 A1Genesis Advanced Technology Inc.
- Energy transfer machine for corrosive fluids31 Aug 2023US 2023/0272794 A1Genesis Advanced Technology Inc.
- Vacuum system having condenser and root vacuum pump set30 Mar 2023US 2023/0096279 A1
- Scroll compressor and air conditioner having same6 Oct 2022US 2022/0316474 A1LG Electronics Inc.
Most cited
By later US patents
- Method of scavenging air and oil and gear pump therefor35US 5,004,407 ASundstrand Corporation · 1991
- Liquid ring pump having tapered blades and housing28US 5,078,573 AA. Ahlstrom Corporation · 1992
- Fluid compressor with selector valve19US 5,547,344 AKabushiki Kaisha Toshiba · 1996
- Centrifugal pump with sealing means11US 5,114,310 AA. Ahlstrom Corporation · 1992
- Centrifugal pump11US 5,152,663 AA. Ahlstrom Corporation · 1992