F22
Steam generation
F22 (Steam generation) appears on 6,323 US grants and 4,693 published applications in this corpus.
Search patents in F22- Granted patents
- 6,323
- Published applications
- 4,693
- Assignees
- 2,335
- Inventors
- 10,998
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 84 | 0 |
| 1977 | 93 | 0 |
| 1978 | 89 | 0 |
| 1979 | 65 | 0 |
| 1980 | 115 | 0 |
| 1981 | 149 | 0 |
| 1982 | 93 | 0 |
| 1983 | 114 | 0 |
| 1984 | 175 | 0 |
| 1985 | 146 | 0 |
| 1986 | 134 | 0 |
| 1987 | 195 | 0 |
| 1988 | 149 | 0 |
| 1989 | 161 | 0 |
| 1990 | 129 | 0 |
| 1991 | 120 | 0 |
| 1992 | 90 | 0 |
| 1993 | 88 | 0 |
| 1994 | 111 | 0 |
| 1995 | 74 | 0 |
| 1996 | 78 | 0 |
| 1997 | 60 | 0 |
| 1998 | 100 | 0 |
| 1999 | 75 | 0 |
| 2000 | 82 | 0 |
| 2001 | 82 | 16 |
| 2002 | 64 | 49 |
| 2003 | 56 | 52 |
| 2004 | 57 | 62 |
| 2005 | 52 | 69 |
| 2006 | 70 | 125 |
| 2007 | 50 | 119 |
| 2008 | 52 | 148 |
| 2009 | 65 | 189 |
| 2010 | 83 | 213 |
| 2011 | 103 | 240 |
| 2012 | 107 | 276 |
| 2013 | 159 | 305 |
| 2014 | 202 | 293 |
| 2015 | 182 | 307 |
| 2016 | 212 | 291 |
| 2017 | 249 | 252 |
| 2018 | 231 | 264 |
| 2019 | 297 | 253 |
| 2020 | 223 | 222 |
| 2021 | 203 | 194 |
| 2022 | 197 | 206 |
| 2023 | 179 | 176 |
| 2024 | 168 | 174 |
| 2025 | 132 | 119 |
| 2026 | 79 | 79 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subclasses
Granted patents
Recent patents
- Thermal energy storage system coupled with a solid oxide electrolysis system6 Oct 2026US 12,753,710 B2Rondo Energy, Inc.
- E-vapor device with bimetallic actuator for opening and sealing reservoir15 Sep 2026US 12,733,681 B2Altria Client Services LLC
- Induced drafting in process heaters15 Sep 2026US 12,736,215 B2Saudi Arabian Oil Company
- Thermal energy storage system coupled with thermal power cycle systems8 Sep 2026US 12,729,632 B1Rondo Energy, Inc.
- Thermal energy storage systems for use in material processing1 Sep 2026US 12,723,524 B2Rondo Energy, Inc.
- System for reheat steam temperature turndown control in heat recovery steam generators8 Oct 2026US 2026/0309057 A1GE Vernova Infrastructure Technology LLC
- Economizer and boiler8 Oct 2026US 2026/0309323 A1Kurita Water Industries Ltd.
- Steam generation unit using a heat exchanger1 Oct 2026US 2026/0298463 A1Trane International Inc.
- Stress Relieving Attachment Of Tube To Tubesheet, Such As In A Pressure Vessel Shell Of A Nuclear Reactor Power System1 Oct 2026US 2026/0298464 A1NuScale Power, LLC
- Non-condensable gas reinjection system24 Sep 2026US 2026/0287212 A1Fuji Electric Co., Ltd.
Most cited
By later US patents
- Aerosol electronic cigarette597US 8,365,742 B2Ruyan Investment (Holdings) Limited · 2013
- Aerosol electronic cigarette505US 8,156,944 B2Ruyan Investments (Holdings) Limited · 2012
- Thermally-enhanced oil recovery method and apparatus399US 4,694,907 ACarbotek, Inc. · 1987
- Electronic cigarette392US 8,375,957 B2Ruyan Investment (Holdings) Limited · 2013
- Flexible cable243US 5,174,164 AWestinghouse Electric Corp. · 1992