F02C 9/24
Control of the pressure level in closed cycles
F02C9/24 (Control of the pressure level in closed cycles) appears on 61 US grants and 69 published applications in this corpus.
Search patents in F02C- Granted patents
- 61
- Published applications
- 69
- Assignees
- 36
- Inventors
- 133
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 4 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 4 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 2 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 4 |
| 2017 | 4 | 3 |
| 2018 | 2 | 11 |
| 2019 | 6 | 6 |
| 2020 | 8 | 6 |
| 2021 | 6 | 9 |
| 2022 | 9 | 3 |
| 2023 | 3 | 6 |
| 2024 | 7 | 6 |
| 2025 | 3 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Conditioning gas for a pipeline21 Oct 2025US 12,449,195 B2Sapphire Technologies, Inc.
- Turbine overspeed protection8 Jul 2025US 12,352,178 B2ROLLS-ROYCE plc
- Measurement method for steam valve and measurement device for steam valve29 Apr 2025US 12,287,045 B2Mitsubishi Heavy Industries, Ltd.
- Power plant24 Dec 2024US 12,173,626 B1
- Fluid delivery system12 Nov 2024US 12,140,079 B2Hamilton Sundstrand Corporation
- Geared gas turbine engine30 Jan 2025US 2025/0035054 A1ROLLS-ROYCE plc
- Turbine overspeed protection7 Nov 2024US 2024/0368999 A1ROLLS-ROYCE plc
- Measurement method for steam valve and measurement device for steam valve17 Oct 2024US 2024/0344631 A1Mitsubishi Heavy Industries, Ltd.
- Variable pressure inventory control of closed cycle system with a high pressure tank and an intermediate pressure tank10 Oct 2024US 2024/0337220 A1Malta Inc.
- Micro gas turbine designed to limit heat losses therefrom12 Sep 2024US 2024/0301820 A1MTT Solutions B.V.
Most cited
By later US patents
- Aerodynamic lift apparatus120US 6,073,881 A2000
- Method for operating a closed Brayton engine and engine adapted for use with method77US 5,131,231 AAllied-Signal Inc. · 1992
- Method for regulating the power output of a thermodynamic system operating on a closed gas cycle and apparatus for carrying out the method63US 4,148,191 ABBC Brown, Boveri & Company, Limited · 1979
- Variable pressure turbine54US 11,352,951 B2Malta Inc. · 2022
- Use of external air for closed cycle inventory control53US 10,221,775 B2Malta Inc. · 2019