F04F 5/22
Of multi-stage type
Official title: of multi-stage type
F04F5/22 (Of multi-stage type) appears on 51 US grants and 44 published applications in this corpus.
Search patents in F04F- Granted patents
- 51
- Published applications
- 44
- Assignees
- 31
- Inventors
- 92
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 2 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 1 |
| 2015 | 1 | 7 |
| 2016 | 0 | 3 |
| 2017 | 3 | 4 |
| 2018 | 1 | 2 |
| 2019 | 7 | 4 |
| 2020 | 5 | 1 |
| 2021 | 3 | 4 |
| 2022 | 1 | 2 |
| 2023 | 1 | 2 |
| 2024 | 1 | 4 |
| 2025 | 0 | 1 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Two-stage jet device with flow guide structure15 Sep 2026US 12,736,066 B2Jiangsu University
- Multi-stage vacuum generator20 Jan 2026US 12,529,385 B2Coval
- Vacuum ejector pump20 Jan 2026US 12,529,386 B2Vtec Co., Ltd.
- Vacuum ejector pump with multiple nozzles18 Jun 2024US 12,012,975 B2Vtec Co., Ltd.
- Multistage aspirator for inflatable assemblies24 Jan 2023US 11,560,905 B2Goodrich Corporation
- Two-stage jet device with flow guide structure2 Jul 2026US 2026/0185543 A1Jiangsu University
- Vacuum ejector pump9 Oct 2025US 2025/0314259 A1Vtec Co., Ltd.
- Multi-stage vacuum generator26 Dec 2024US 2024/0426321 A1Coval
- Multi-ejector vacuum generator, fastening means multi-ejector vacuum generator and vacuum generator pump20 Jun 2024US 2024/0200578 A1
- Fuel cell ejector16 May 2024US 2024/0159251 A1Ford Global Technologies, LLC
Most cited
By later US patents
- Pneumatic powder ejector93US 4,807,814 ASaint-Gobain Vitrage · 1989
- Ultra-high vacuum force, low air consumption pumps54US 4,880,358 AAir-Vac Engineering Company, Inc. · 1989
- Multistage ejector assembly46US 5,683,227 ASMC Corporation · 1997
- Ejector device38US 4,466,778 A1984
- Method for producing an ejector device36US 3,959,864 AAktiebolaget Piab · 1976