F24D 13/04
Electric heating systems: using electric heating of heat-transfer fluid in separate units
Official title: using electric heating of heat-transfer fluid in separate units of the system
F24D13/04 (Electric heating systems: using electric heating of heat-transfer fluid in separate units) appears on 29 US grants and 39 published applications in this corpus.
Search patents in F24D- Granted patents
- 29
- Published applications
- 39
- Assignees
- 29
- Inventors
- 62
- Latest grant
- 20 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 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 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 1 | 3 |
| 2014 | 5 | 3 |
| 2015 | 1 | 3 |
| 2016 | 4 | 3 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 1 |
| 2021 | 2 | 4 |
| 2022 | 1 | 3 |
| 2023 | 1 | 1 |
| 2024 | 1 | 3 |
| 2025 | 2 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electric boiler11 Jun 2026US 2026/0160429 A1
- Heating body30 Apr 2026US 2026/0118066 A1
- Co-generation system for heating application27 Nov 2025US 2025/0362033 A1Caterpillar Inc.
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Most cited
By later US patents
- Microwave heating method and apparatus27US 4,114,011 AThermatron, Inc. · 1978
- Electromagnetic induction heating apparatus13US 3,936,625 APollutant Separation, Inc. · 1976
- Convection space heater with interconnected housing segments using hair dryer as heated air source9US 6,130,991 A2000
- In-line duct supplemental heating and cooling device and method8US 8,285,127 B2TPI Corporation · 2012
- Heating system, kit and method of using6US 9,976,774 B12018