F24S 20/40
Solar heat collectors combined with other heat sources
Official title: Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
F24S20/40 (Solar heat collectors combined with other heat sources) appears on 79 US grants and 93 published applications in this corpus.
Search patents in F24S- Granted patents
- 79
- Published applications
- 93
- Assignees
- 62
- Inventors
- 212
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 1 | 6 |
| 2012 | 1 | 2 |
| 2013 | 1 | 9 |
| 2014 | 4 | 9 |
| 2015 | 6 | 4 |
| 2016 | 4 | 6 |
| 2017 | 5 | 9 |
| 2018 | 4 | 8 |
| 2019 | 4 | 3 |
| 2020 | 2 | 5 |
| 2021 | 1 | 1 |
| 2022 | 3 | 9 |
| 2023 | 5 | 7 |
| 2024 | 4 | 3 |
| 2025 | 5 | 4 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Concentrated solar energy collection, thermal storage, and power generation systems and methods with optional supplemental fuel production25 Aug 2026US 12,716,618 B2247Solar Inc.
- Method and system for cooling of a device14 Jul 2026US 12,685,018 B2K2 Capital GmbH
- Control method and device for phase-change energy storage type cold and heat combined supply system with multi-heat source heat pump16 Jun 2026US 12,656,023 B2Nanjing Jiangbei New Area Public Utilities Holding Group Co. Ltd
- Solar heating for refrigeration and fluid heating devices2 Dec 2025US 12,486,990 B2Lema S.R.L.
- Plant and method for accumulation of energy in thermal form5 Aug 2025US 12,379,137 B2Magaldi Power S.P.A.
- Concentrated solar energy collection, thermal storage, and power generation systems and methods with optional supplemental fuel production11 Jun 2026US 2026/0160451 A1247Solar Inc.
- Heating system4 Jun 2026US 2026/0153266 A1Intellihot, Inc.
- Solar heating system for tanked asphalt29 Jan 2026US 2026/0029160 A1Henan Agricultural University
- Concentrated solar power storage system and method7 Aug 2025US 2025/0250969 A1Power8 Tech. Inc.
- Load Balanced Solar Thermal System27 Mar 2025US 2025/0102188 A1Exowatt, Inc.
Most cited
By later US patents
- Integral solar and heat pump water heating system36US 4,507,936 AMitsubishi Denki Kabushiki Kaisha · 1985
- Methods and apparatuses for detection of properties of fluid conveyance systems33US 8,441,361 B2McAllister Technologies, LLC · 2013
- Solar energy conversion unit29US 4,159,712 A1979
- Heat exchanger29US 4,619,317 AHoechst Aktiengesellschaft · 1986
- Reactors for conducting thermochemical processes with solar heat input, and associated systems and methods25US 8,187,550 B2McAlister Technologies, LLC · 2012