F01K 7/40
Use of two or more feed-water heaters in series
F01K7/40 (Use of two or more feed-water heaters in series) appears on 89 US grants and 87 published applications in this corpus.
Search patents in F01K- Granted patents
- 89
- Published applications
- 87
- Assignees
- 54
- Inventors
- 197
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 5 |
| 2010 | 0 | 2 |
| 2011 | 2 | 7 |
| 2012 | 1 | 9 |
| 2013 | 3 | 11 |
| 2014 | 3 | 10 |
| 2015 | 5 | 16 |
| 2016 | 11 | 4 |
| 2017 | 10 | 1 |
| 2018 | 9 | 3 |
| 2019 | 3 | 2 |
| 2020 | 0 | 3 |
| 2021 | 8 | 3 |
| 2022 | 2 | 2 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power generation facility28 Jul 2026US 12,692,803 B2Kabushiki Kaisha Toshiba
- Power generating machine system26 Dec 2023US 11,852,044 B2
- Hybrid power generation equipment19 Jul 2022US 11,391,204 B2
- Steam power plant, modification method and operation method of steam power plant1 Feb 2022US 11,236,640 B2Mitsubishi Power, Ltd.
- Combined heat recovery device17 Aug 2021US 11,092,040 B2
- Power generation facility9 Jan 2025US 2025/0012207 A1Kabushiki Kaisha Toshiba
- Power generation facility11 Apr 2024US 2024/0117759 A1Kabushiki Kaisha Toshiba
- Power generating machine system13 Oct 2022US 2022/0325636 A1
- Hybrid power generation equipment5 May 2022US 2022/0136412 A1Doosan Heavy Industries Construction Co., Ltd
- Double-reheat power generator with an ultra high pressure cylinder and a high-intermediate pressure cylinder each having additional heat recovery turbine stages13 May 2021US 2021/0140347 A1
Most cited
By later US patents
- Heat engine system having a selectively configurable working fluid circuit82US 9,874,112 B2Echogen Power Systems, LLC · 2018
- Thermal energy storage and utilization system37US 4,003,786 AExxon Research & Engineering Co. · 1977
- Waste heat recovery system with partial recuperation33US 8,919,123 B2Mack Trucks, Inc. · 2014
- Power plant27US 4,069,674 A1978
- Off-shore power plant22US 3,962,877 ADeutsche Babcock & Wilcox Aktiengesellschaft · 1976