F22D 1/02
Feed-water heaters, i.e. economisers or like preheaters: with water tubes arranged in
Official title: with water tubes arranged in the boiler furnaces, fire tubes or flue ways
F22D1/02 (Feed-water heaters, i.e. economisers or like preheaters: with water tubes arranged in) appears on 91 US grants and 81 published applications in this corpus.
Search patents in F22D- Granted patents
- 91
- Published applications
- 81
- Assignees
- 66
- Inventors
- 237
- Latest grant
- 29 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 1 | 2 |
| 2008 | 0 | 3 |
| 2009 | 3 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 5 |
| 2013 | 1 | 7 |
| 2014 | 3 | 7 |
| 2015 | 3 | 7 |
| 2016 | 5 | 12 |
| 2017 | 5 | 6 |
| 2018 | 11 | 8 |
| 2019 | 11 | 3 |
| 2020 | 3 | 0 |
| 2021 | 5 | 1 |
| 2022 | 2 | 2 |
| 2023 | 4 | 3 |
| 2024 | 2 | 4 |
| 2025 | 0 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Steam boiler system and method of circulating water and steam in a steam boiler system29 Oct 2024US 12,130,011 B2Maxi-Therme Inc.
- Water treatment system2 Apr 2024US 11,944,922 B1
- Steam generation apparatus and exhaust gas heat recovery plant5 Dec 2023US 11,834,968 B2Mitsubishi Heavy Industries, Ltd.
- Systems and methods for enhancing amine agent recovery with a reclaimer21 Nov 2023US 11,819,777 B2Saudi Arabian Oil Company
- Method of efficiency enhancement of fired heaters without air preheat systems31 Oct 2023US 11,802,687 B2Uop LLC
- Economizer and boiler8 Oct 2026US 2026/0309323 A1Kurita Water Industries Ltd.
- Boiler system and method for operating boiler system1 May 2025US 2025/0137151 A1Miura Co., Ltd.
- Processes and apparatuses for heating a process fluid27 Feb 2025US 2025/0067516 A1Uop LLC
- Steam boiler system and method of circulating water and steam in a steam boiler system19 Dec 2024US 2024/0418361 A1Maxi-Therme Inc.
- Steam generator and method24 Oct 2024US 2024/0353093 A1
Most cited
By later US patents
- Heat recovery apparatus and an improved heat recovery method40US 5,347,958 A1994
- System and methods for controlling a water heater35US 7,290,502 B2Emerson Electric Co. · 2007
- Control system for economic operation of a steam generator27US 4,489,679 ACombustion Engineering, Inc. · 1984
- Water heating system including recycle loop26US 4,037,567 A1977
- Condensing heat recovery steam generator21US 10,221,726 B2Cockerill Maintenance & Ingenierie S.A. · 2019