F22D 1/003
Feed-water heater systems
Official title: {Feed-water heater systems (F22D1/325, F22D1/36 and F22D1/40 take precedence)}
F22D1/003 (Feed-water heater systems) appears on 45 US grants and 63 published applications in this corpus.
Search patents in F22D- Granted patents
- 45
- Published applications
- 63
- Assignees
- 40
- Inventors
- 148
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 7 |
| 2014 | 0 | 6 |
| 2015 | 4 | 4 |
| 2016 | 3 | 3 |
| 2017 | 4 | 4 |
| 2018 | 3 | 2 |
| 2019 | 5 | 3 |
| 2020 | 3 | 4 |
| 2021 | 3 | 5 |
| 2022 | 2 | 2 |
| 2023 | 2 | 4 |
| 2024 | 4 | 4 |
| 2025 | 0 | 1 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Generating electrical energy from hydrogen and oxygen7 Apr 2026US 12,595,761 B2Siemens Energy Global GmbH & Co. KG
- Start-up and control of liquid salt energy storage combined cycle systems24 Mar 2026US 12,584,424 B2Pintail Power LLC
- Method and system for steamcracking17 Feb 2026US 12,552,996 B2Linde Aktiengesellschaft
- Start-up and control of liquid salt energy storage combined cycle systems29 Oct 2024US 12,129,773 B2Pintail Power LLC
- Steam boiler system and method of circulating water and steam in a steam boiler system29 Oct 2024US 12,130,011 B2Maxi-Therme Inc.
- Integrated once through cooler water and steam sharing system for multi-unit gas turbine combined cycle power blocks23 Apr 2026US 2026/0110255 A1ACWA POWER Company
- Start-up and control of liquid salt energy storage combined cycle systems6 Feb 2025US 2025/0043701 A1Pintail Power LLC
- Steam boiler system and method of circulating water and steam in a steam boiler system19 Dec 2024US 2024/0418361 A1Maxi-Therme Inc.
- Generating electrical energy from hydrogen and oxygen20 Jun 2024US 2024/0200472 A1Siemens Energy Global GmbH & Co. KG
- Method and System for Steamcracking16 May 2024US 2024/0158701 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Flue gas heat recovery system32US 4,660,511 A1987
- Pipeline heater28US 7,066,730 B2Catalytic Industrial Group, Inc. · 2006
- Method for operating a system for steam generation, and steam generator system21US 5,293,842 ASiemens Aktiengesellschaft · 1994
- Integrated split stream water coil air heater and economizer (IWE)13US 8,286,595 B2Babcock & Wilcox Power Generation Group, Inc. · 2012
- Feed water heater10US 6,508,206 B1Nooter/Eriksen, Inc. · 2003