F22D 1/24
Feed-water heaters, i.e. economisers or like preheaters: with fire tubes or flue
Official title: with fire tubes or flue ways traversing feed-water vessels
F22D1/24 (Feed-water heaters, i.e. economisers or like preheaters: with fire tubes or flue) appears on 6 US grants and 3 published applications in this corpus.
Search patents in F22D- Granted patents
- 6
- Published applications
- 3
- Assignees
- 3
- Inventors
- 9
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 2 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heat exchanger baffles and methods for manufacturing the same19 May 2026US 12,631,409 B2Bradford White Corporation
- Economizer22 Aug 2023US 11,732,885 B2
- Steam arrangement for exterminating the Argentina Fire Ant16 Jul 1991US 5,031,355 A
- Economizer for smoke tube boilers for high pressure steam and hot water8 Jan 1980US 4,182,276 AIndukal ApS
- Hot water or steam boiler7 Nov 1978US 4,123,995 AOsby, Varme AB
Most cited
By later US patents
- Steam arrangement for exterminating the Argentina Fire Ant17US 5,031,355 A1991
- Water tank heated by smoke from a furnace6US 4,048,962 A1977
- Hot water or steam boiler4US 4,123,995 AOsby, Varme AB · 1978
- Economizer for smoke tube boilers for high pressure steam and hot water2US 4,182,276 AIndukal ApS · 1980