F22B 7/00
Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed
Official title: Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body
F22B7/00 (Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed) appears on 79 US grants and 35 published applications in this corpus.
Search patents in F22B- Granted patents
- 79
- Published applications
- 35
- Assignees
- 52
- Inventors
- 123
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 1 |
| 2005 | 1 | 3 |
| 2006 | 3 | 4 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 2 | 1 |
| 2010 | 2 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 2 |
| 2015 | 2 | 1 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 1 | 2 |
| 2019 | 2 | 4 |
| 2020 | 0 | 0 |
| 2021 | 3 | 1 |
| 2022 | 0 | 2 |
| 2023 | 0 | 3 |
| 2024 | 1 | 1 |
| 2025 | 4 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F22B 7/12Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed34
- F22B 7/16Component parts thereof14
- F22B 7/04Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed11
- F22B 7/02Without auxiliary water tubes3
- F22B 7/14Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed2
Recent patents
- Boiler tube insert and boiler tubes having inserts2 Jun 2026US 12,644,594 B2Cleaver-Brooks, Inc.
- Hydrogen-oxygen bubble steam boiler6 Jan 2026US 12,516,807 B2
- Downward mobile gasification boiler for surface gas phase combustion and pyrolysis of biomass briquette11 Nov 2025US 12,467,620 B2Heilongjiang Zhongtan Jiahe Biomass Technology Research and Development Co.
- Heat pipe unit and waste heat recovery boiler including same23 Sep 2025US 12,422,193 B2Doosan Enerbility Co., Ltd.
- Sodium-chlorine boiler16 Sep 2025US 12,416,250 B1Teratech International, Inc.
- Sodium-chlorine boiler11 Sep 2025US 2025/0283422 A1Teratech International, Inc.
- Hydrogen-oxygen bubble steam boiler12 Jun 2025US 2025/0189119 A1
- Heat pipe unit and waste heat recovery boiler including same30 May 2024US 2024/0175639 A1Doosan Enerbility Co., Ltd.
- Boiler Tube Insert and Boiler Tubes Having Inserts2 Nov 2023US 2023/0349546 A1Cleaver-Brooks, Inc.
- Combustion boiler28 Sep 2023US 2023/0304658 A1
Most cited
By later US patents
- Process and apparatus utilizing common structure for combustion, gas fixation, or waste heat recovery53US 4,344,479 AFuelsaver Company · 1982
- Process and apparatus for heating fluids employing a pulse combustor44US 5,211,704 AManufacturing and Technology Conversion International, Inc. · 1993
- Ultra-low NO.sub.x combustion apparatus36US 4,989,549 ADonlee Technologies, Inc. · 1991
- Steam cooker and related superheater35US 7,418,960 B2Premark FEG L.L.C. · 2008
- Coal feed and injection system for a coal-fired firetube boiler29US 5,630,368 AThe University of Tennessee Research Corporation · 1997