F28D 21/001
For thermal power plants or industrial processes
Official title: {for thermal power plants or industrial processes}
F28D21/001 (For thermal power plants or industrial processes) appears on 159 US grants and 202 published applications in this corpus.
Search patents in F28D- Granted patents
- 159
- Published applications
- 202
- Assignees
- 159
- Inventors
- 487
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 2 |
| 2004 | 1 | 2 |
| 2005 | 0 | 4 |
| 2006 | 5 | 3 |
| 2007 | 0 | 1 |
| 2008 | 1 | 3 |
| 2009 | 1 | 2 |
| 2010 | 3 | 3 |
| 2011 | 1 | 4 |
| 2012 | 1 | 9 |
| 2013 | 1 | 16 |
| 2014 | 3 | 8 |
| 2015 | 3 | 12 |
| 2016 | 8 | 17 |
| 2017 | 9 | 8 |
| 2018 | 7 | 12 |
| 2019 | 10 | 13 |
| 2020 | 9 | 9 |
| 2021 | 10 | 21 |
| 2022 | 11 | 12 |
| 2023 | 17 | 16 |
| 2024 | 12 | 9 |
| 2025 | 12 | 10 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System for restoration of a salty body of water that harnesses hydro, solar, and geothermal energy, to be used in remote locations and different applications including the production of distilled water from a salty body of water31 Mar 2026US 12,590,736 B2
- Thermal energy storage systems for use in material processing20 Jan 2026US 12,529,327 B2Rondo Energy, Inc.
- Thermal energy storage systems for use in material processing30 Dec 2025US 12,510,006 B2Rondo Energy, Inc.
- Heat exchange unit9 Dec 2025US 12,492,872 B2Helical Energy Limited
- Thermal energy storage systems for use in material processing2 Dec 2025US 12,486,789 B2Rondo Energy, Inc.
- High temperature heat pumps10 Sep 2026US 2026/0266563 A1TerraPower, LLC
- Heat exchanger and burner4 Jun 2026US 2026/0153292 A1NGK Insulators, Ltd.
- Thermal energy storage systems for use in material processing2 Apr 2026US 2026/0092542 A1Rondo Energy, Inc.
- Electrolyzer using recoverable process heat12 Mar 2026US 2026/0071336 A1Advanced Ionics, Inc.
- Multi-half pipe heat exchange system for electric arc, metallurgical or refining furnaces and system thereof29 Jan 2026US 2026/0029197 A1Amerifab, Inc.
Most cited
By later US patents
- Hydraulic fracturing system and method179US 9,840,897 B22017
- Tubular heat exchange systems97US 9,200,855 B2Honeywell International Inc. · 2015
- Exhaust gas treatment method and apparatus47US 4,487,139 AHeat Exchanger Industries, Inc. · 1984
- Exhaust gas treatment method and apparatus44US 4,557,202 AHeat Exchanger Industries, Inc. · 1985
- Apparatus for preheating combustion air, accompanied by simultaneous reduction of NO.sub.x contained in the flue gases38US 4,602,673 AL. & C. Steinmuller GmbH · 1986