F04F 13/00
Pressure exchangers
F04F13/00 (Pressure exchangers) appears on 211 US grants and 218 published applications in this corpus.
Search patents in F04F- Granted patents
- 211
- Published applications
- 218
- Assignees
- 72
- Inventors
- 264
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 3 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 2 | 5 |
| 2007 | 5 | 3 |
| 2008 | 0 | 0 |
| 2009 | 1 | 6 |
| 2010 | 2 | 4 |
| 2011 | 2 | 3 |
| 2012 | 3 | 10 |
| 2013 | 0 | 7 |
| 2014 | 2 | 5 |
| 2015 | 3 | 9 |
| 2016 | 5 | 25 |
| 2017 | 9 | 16 |
| 2018 | 15 | 13 |
| 2019 | 19 | 10 |
| 2020 | 12 | 13 |
| 2021 | 14 | 13 |
| 2022 | 8 | 13 |
| 2023 | 8 | 16 |
| 2024 | 16 | 18 |
| 2025 | 20 | 10 |
| 2026 | 7 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Enhancing efficiency in a pressure exchanger8 Sep 2026US 12,729,698 B2Energy Recovery, Inc.
- Minimizing mixing in a pressure exchanger11 Aug 2026US 12,704,134 B2Energy Recovery, Inc.
- Geothermal power generation systems with pressure exchangers12 May 2026US 12,624,681 B2Energy Recovery, Inc.
- Rotary pressure exchanger12 May 2026US 12,624,709 B2Sulzer Management AG
- Pneumohydraulic pressure intensifier12 May 2026US 12,624,710 B2WS Wieländer + Schill Engineering GmbH & Co. KG
- Geothermal and geopressure recovery systems1 Oct 2026US 2026/0298213 A1Sage Geosystems Inc.
- Semi-hermetic motorized pressure exchanger1 Oct 2026US 2026/0298266 A1Energy Recovery, Inc.
- Geothermal power generation systems with pressure exchangers17 Sep 2026US 2026/0275967 A1Energy Recovery, Inc.
- Transcritical refrigeration pressure exchanger17 Sep 2026US 2026/0276009 A1Energy Recovery, Inc.
- Thermo-electrochemical converter with pressure exchange energy recovery20 Aug 2026US 2026/0243236 A1Jtec Energy, Inc.
Most cited
By later US patents
- Pressure exchanger with an anti-cavitation pressure relief system in the end covers70US 6,540,487 B2Energy Recovery, Inc. · 2003
- Staged expansion system as employed with an integral turbo-compressor wave engine69US 3,958,899 AGeneral Power Corporation · 1976
- Pressure exchanger60US 7,306,437 B22007
- Pressure exchanger for liquids57US 4,887,942 A1989
- Pressure exchange apparatus51US 6,537,035 B22003