F04B 25/00
Multi-stage pumps
F04B25/00 (Multi-stage pumps) appears on 372 US grants and 389 published applications in this corpus.
Search patents in F04B- Granted patents
- 372
- Published applications
- 389
- Assignees
- 254
- Inventors
- 743
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 8 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 1 |
| 2002 | 4 | 10 |
| 2003 | 12 | 9 |
| 2004 | 9 | 13 |
| 2005 | 5 | 13 |
| 2006 | 2 | 11 |
| 2007 | 7 | 12 |
| 2008 | 7 | 9 |
| 2009 | 6 | 17 |
| 2010 | 1 | 10 |
| 2011 | 7 | 10 |
| 2012 | 9 | 10 |
| 2013 | 8 | 22 |
| 2014 | 10 | 21 |
| 2015 | 10 | 21 |
| 2016 | 13 | 15 |
| 2017 | 12 | 12 |
| 2018 | 14 | 18 |
| 2019 | 16 | 26 |
| 2020 | 19 | 25 |
| 2021 | 26 | 31 |
| 2022 | 23 | 17 |
| 2023 | 17 | 15 |
| 2024 | 23 | 15 |
| 2025 | 17 | 12 |
| 2026 | 9 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air compressor29 Sep 2026US 12,747,730 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Throttle valve for coolant circulation system18 Aug 2026US 12,710,056 B2Ingersoll-Rand Industrial U.S., Inc.
- Double acting two stage piston type pump23 Jun 2026US 12,662,996 B2Zf Cv Systems Europe BV
- Method for heat recovery in a compressor and a compressor19 May 2026US 12,631,175 B2Tamturbo Oyj
- Sealing gas leakage recovery and sealing gas boosting system and method28 Apr 2026US 12,612,922 B2Nuovo Pignone Tecnologie Srl
- Split-architecture high-pressure gas compressor system and method8 Oct 2026US 2026/0309138 A1Arctic Compressor, LLC
- Method and Apparatus for Hydrogen Pumping and Compression10 Sep 2026US 2026/0266274 A1FirstElement Fuel, Inc.
- Multi-stage gas compression system10 Sep 2026US 2026/0266278 A1ElektrikGreen, Inc.
- Linear natural gas compressor with hydraulic motor3 Sep 2026US 2026/0258795 A1The Williams Companies, Inc.
- Fuel compressor20 Aug 2026US 2026/0243241 A1Phinia Delphi Luxembourg Sarl
Most cited
By later US patents
- Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization134US 5,988,165 AInvacare Corporation · 1999
- Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization113US 6,302,107 B1Invacare Corporation · 2001
- High pressure compressor with controlled cooling during the compression phase97US 5,674,053 A1997
- Method and equipment for improving the efficiency of compressors and refrigerators94US 10,961,995 B22021
- High pressure compressor with internal, cooled compression92US 5,769,610 A1998