F24H 1/225
Electrical central heating boilers
Official title: {electrical central heating boilers}
F24H1/225 (Electrical central heating boilers) appears on 49 US grants and 36 published applications in this corpus.
Search patents in F24H- Granted patents
- 49
- Published applications
- 36
- Assignees
- 34
- Inventors
- 91
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 1 |
| 2004 | 2 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 5 |
| 2012 | 2 | 7 |
| 2013 | 1 | 1 |
| 2014 | 2 | 1 |
| 2015 | 0 | 3 |
| 2016 | 2 | 3 |
| 2017 | 2 | 0 |
| 2018 | 3 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 2 | 1 |
| 2025 | 0 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Control system for building equipment with secondary strong prevention11 Aug 2026US 12,704,268 B2Tyco Fire & Security GmbH
- Electric boiler5 May 2026US 12,618,589 B2
- Plasma heating apparatus, system and method15 Oct 2024US 12,117,165 B2Aureon Energy Ltd.
- Central plant with secondary strong prevention16 Jan 2024US 11,873,998 B2Johnson Controls Tyco IP Holdings LLP
- Plasma heating apparatus, system and method7 Sep 2021US 11,112,109 B1Aureon Energy Ltd.
- Water heating system14 Aug 2025US 2025/0257904 A1Luthmore Ltd
- A method and an apparatus for boiler electrification and an electrified boiler5 Jun 2025US 2025/0180201 A1Chromalox, Inc.
- Control system for building equipment with secondary strong prevention21 Mar 2024US 2024/0093883 A1Johnson Controls Tyco IP Holdings LLP
- Water heater and a method of heating water utilizing microwave energy15 Jun 2023US 2023/0184459 A1
- An electric boiler13 Apr 2023US 2023/0112867 A1NAGI, Jaskiran Singh
Most cited
By later US patents
- Electric water heater with upwardly inclined zig-zag flow path48US 4,436,983 A1984
- Method and apparatus for electrically heating a fluid41US 3,968,346 A1976
- Apparatus and method for converting electrical energy into heat energy41US 4,336,444 AGust, Irish, Jeffers & Hoffman · 1982
- Microwave heating method and apparatus27US 4,114,011 AThermatron, Inc. · 1978
- Fluid heating device incorporating transformer secondary winding having a single electrical turn and cooling means optimized for heat transfer27US 4,855,552 AHydro-Quebec · 1989