F01K 7/22
The turbines having inter-stage steam heating
Official title: the turbines having inter-stage steam heating
F01K7/22 (The turbines having inter-stage steam heating) appears on 267 US grants and 267 published applications in this corpus.
Search patents in F01K- Granted patents
- 267
- Published applications
- 267
- Assignees
- 115
- Inventors
- 642
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 8 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 4 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 4 |
| 2007 | 0 | 2 |
| 2008 | 1 | 5 |
| 2009 | 4 | 6 |
| 2010 | 4 | 13 |
| 2011 | 3 | 19 |
| 2012 | 3 | 33 |
| 2013 | 11 | 25 |
| 2014 | 21 | 22 |
| 2015 | 20 | 28 |
| 2016 | 17 | 18 |
| 2017 | 27 | 10 |
| 2018 | 14 | 14 |
| 2019 | 17 | 8 |
| 2020 | 7 | 9 |
| 2021 | 15 | 20 |
| 2022 | 11 | 6 |
| 2023 | 6 | 1 |
| 2024 | 7 | 7 |
| 2025 | 4 | 7 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- H2 power plant with O2 integration25 Aug 2026US 12,716,371 B2Mitsubishi Power Americas, Inc.
- Reaction turbine operating on condensing vapors18 Aug 2026US 12,709,999 B2
- Thermal power plant10 Feb 2026US 12,546,238 B2
- Intermediate pressure supercritical CO2 power cycle2 Dec 2025US 12,486,790 B2Southwest Research Institute
- Compressor train for chemical plant19 Aug 2025US 12,392,262 B2Mitsubishi Heavy Industries Compressor Corporation
- System for reheat steam temperature turndown control in heat recovery steam generators23 Jul 2026US 2026/0210275 A1General Electric Technology GmbH
- Heat utilization system and heat utilization method25 Jun 2026US 2026/0176986 A1Mitsubishi Heavy Industries, Ltd.
- Flue Gas Analysis Device11 Dec 2025US 2025/0377345 A1Seitron S.P.A.
- Combined cycle power plant having a carbon capture system with a dedicated steam turbine10 Jul 2025US 2025/0223914 A1GE Infrastructure Technology LLC
- Plant5 Jun 2025US 2025/0177943 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Energy recovery during expansion of compressed gas using power plant low-quality heat sources88US 7,007,474 B1The United States of America as represented by the United States Department of Energy · 2006
- Apparatus and method for controlling steam turbine operating conditions during starting and loading55US 4,598,551 AGeneral Electric Company · 1986
- Method and system for generating power from low- and mid- temperature heat sources using supercritical rankine cycles with zeotropic mixtures51US 9,376,937 B2University of South Florida · 2016
- Method and apparatus for implementing a thermodynamic cycle with intercooling44US 4,604,867 A1986
- Method of effecting fast turbine valving for improvement of power system stability41US 3,998,058 AFast Load Control Inc. · 1976