F04B 2205/04
Pressure in the outlet chamber
F04B2205/04 (Pressure in the outlet chamber) appears on 140 US grants and 146 published applications in this corpus.
Search patents in F04B- Granted patents
- 140
- Published applications
- 146
- Assignees
- 92
- Inventors
- 318
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 3 | 5 |
| 2004 | 4 | 3 |
| 2005 | 3 | 6 |
| 2006 | 5 | 3 |
| 2007 | 1 | 5 |
| 2008 | 0 | 6 |
| 2009 | 1 | 1 |
| 2010 | 2 | 1 |
| 2011 | 2 | 3 |
| 2012 | 2 | 2 |
| 2013 | 1 | 3 |
| 2014 | 3 | 0 |
| 2015 | 6 | 4 |
| 2016 | 0 | 2 |
| 2017 | 1 | 10 |
| 2018 | 4 | 10 |
| 2019 | 6 | 9 |
| 2020 | 7 | 11 |
| 2021 | 13 | 24 |
| 2022 | 16 | 9 |
| 2023 | 12 | 13 |
| 2024 | 8 | 4 |
| 2025 | 8 | 5 |
| 2026 | 10 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Intuitive Natural Gas Compressor Monitoring System30 Apr 2026US 2026/0117763 A1Inpro/Seal LLC
- Multi-pressure integrated air pump29 Jan 2026US 2026/0028973 A1Intex Marketing Ltd.
- Electric drive fracturing device and braking method therefor30 Oct 2025US 2025/0334111 A1Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
Most cited
By later US patents
- Method and apparatus for controlling fluid pumps304US 6,783,328 B2Terumo Cardiovascular Systems Corporation · 2004
- Pressure sensitive valves for extracorporeal circuits251US 5,186,431 A1993
- Reducing fluid pressure spikes in a pumping system221US 10,393,108 B2Schlumberger Technology Corporation · 2019
- Innovative pumping system for peristaltic pumps201US 5,215,450 A1993
- Pressure regulated electric pump175US 6,074,170 A2000