F22D 5/26
Automatic feed-control systems
F22D5/26 (Automatic feed-control systems) appears on 99 US grants and 96 published applications in this corpus.
Search patents in F22D- Granted patents
- 99
- Published applications
- 96
- Assignees
- 75
- Inventors
- 271
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 1 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 13 |
| 2014 | 1 | 5 |
| 2015 | 5 | 8 |
| 2016 | 8 | 7 |
| 2017 | 6 | 8 |
| 2018 | 8 | 4 |
| 2019 | 6 | 8 |
| 2020 | 2 | 7 |
| 2021 | 11 | 6 |
| 2022 | 9 | 9 |
| 2023 | 3 | 4 |
| 2024 | 6 | 6 |
| 2025 | 4 | 0 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F22D 5/34Applications of valves29
- F22D 5/30Responsive to both water level and amount of steam withdrawn or steam19
- F22D 5/28Responsive to amount of steam withdrawn9
- F22D 5/32Influencing the speed or delivery pressure of the feed pumps7
- F22D 5/36For feeding a number of steam boilers designed for different ranges of4
Recent patents
- Integrated control logic device and operating method thereof to control water level of steam generator of nuclear power plant26 May 2026US 12,638,171 B2Kepco Engineering & Construction Company, Inc.
- Electronic cooking apparatus having steam supply device26 May 2026US 12,638,190 B2LG Electronics Inc.
- Operating a domestic steam-treatment appliance, and domestic steam-treatment appliance23 Dec 2025US 12,504,164 B2BSH Hausgeräte GmbH
- Solar steam electricity system25 Nov 2025US 12,480,428 B1Prince Mohammad Bin Fahd University
- Solar electrical grid with distributed solar generation21 Oct 2025US 12,451,762 B1Prince Mohammad Bin Fahd University
- Steam generator8 Jan 2026US 2026/0009532 A1Kohler Novita., Ltd.
- Steam boiler system and method of circulating water and steam in a steam boiler system19 Dec 2024US 2024/0418361 A1Maxi-Therme Inc.
- Steam generation control method19 Dec 2024US 2024/0418362 A1New Watt (Fujian) High-Tech Co. Ltd
- Steam generator and method24 Oct 2024US 2024/0353093 A1
- Method for level regulation of feed water in a steam sterilizer, and steam sterilizer19 Sep 2024US 2024/0307567 A1MELAG Medizintechnik GmbH & Co. KG
Most cited
By later US patents
- Steam generator32US 10,125,978 B2Panasonic Intellectual Property Management Co., Ltd. · 2018
- Portable steam and heat generator30US 7,100,540 B2Hot Water Holdings Ltd · 2006
- Boiler level control system26US 4,242,989 AGeneral Electric Company · 1981
- Apparatus for controlling drum water level of drum type boiler22US 4,619,224 AHitachi, Ltd. · 1986
- Feedwater control for drum type steam generators21US 5,148,775 AThe Babcock & Wilcox Company · 1992