F22B 3/00
Methods of steam generation: other methods of steam generation
Official title: Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
F22B3/00 (Methods of steam generation: other methods of steam generation) appears on 227 US grants and 229 published applications in this corpus.
Search patents in F22B- Granted patents
- 227
- Published applications
- 229
- Assignees
- 155
- Inventors
- 493
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 7 | 0 |
| 1984 | 11 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 2 |
| 2005 | 1 | 0 |
| 2006 | 2 | 8 |
| 2007 | 0 | 4 |
| 2008 | 2 | 4 |
| 2009 | 2 | 6 |
| 2010 | 2 | 8 |
| 2011 | 3 | 5 |
| 2012 | 0 | 13 |
| 2013 | 6 | 7 |
| 2014 | 5 | 8 |
| 2015 | 6 | 12 |
| 2016 | 1 | 10 |
| 2017 | 10 | 7 |
| 2018 | 7 | 18 |
| 2019 | 16 | 19 |
| 2020 | 14 | 21 |
| 2021 | 10 | 18 |
| 2022 | 24 | 16 |
| 2023 | 18 | 21 |
| 2024 | 10 | 8 |
| 2025 | 11 | 6 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Water processing system and method4 Aug 2026US 12,698,694 B2
- Method and apparatus for manufacturing cement using rotary generated thermal energy28 Jul 2026US 12,692,192 B2Coolbrook Oy
- Heat pump systems and methods14 Jul 2026US 12,680,734 B2AtmosZero, Inc.
- Method and apparatus for heating fluids in processes related to refining and petrochemical industries using rotary generated thermal energy9 Jun 2026US 12,649,689 B2Coolbrook Oy
- Heat generation device, heat utilization system and film-like heat generation element5 May 2026US 12,618,592 B2Clean Planet Inc.
- Refining and/or petrochemical facility and apparatus for heating fluids in processes related to refining and petrochemical industries using rotary generated thermal energy17 Sep 2026US 2026/0274747 A1Coolbrook Oy
- Heat Pump Systems and Methods17 Sep 2026US 2026/0276247 A1AtmosZero, Inc.
- Steam generation system10 Sep 2026US 2026/0266455 A1Hydram Research
- Steam Generation Device and Steam Generation Method2 Jul 2026US 2026/0185698 A1Hitachi, Ltd.
- Heat Pump Systems and Methods22 Jan 2026US 2026/0022875 A1AtmosZero, Inc.
Most cited
By later US patents
- Updating control software on a network-connected HVAC controller142US 8,594,850 B1Nest Labs, Inc. · 2013
- Mechanical liquid vaporizing waterbrake73US 5,279,262 A1994
- Flow control at flash tank of open cycle vapor compression heat pumps69US 4,466,253 AGeneral Electric Company · 1984
- Two-phase expansion system and method for energy recovery52US 7,987,676 B2General Electric Company · 2011
- Downhole steam generator using low pressure fuel and air supply51US 4,390,062 AThe United States of America as represented by the United States Department of Energy · 1983