F24H 15/132
Preventing the operation of water heaters with low water levels
Official title: Preventing the operation of water heaters with low water levels, e.g. dry-firing
F24H15/132 (Preventing the operation of water heaters with low water levels) appears on 77 US grants and 74 published applications in this corpus.
Search patents in F24H- Granted patents
- 77
- Published applications
- 74
- Assignees
- 53
- Inventors
- 183
- Latest grant
- 26 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
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| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
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| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 1 |
| 2004 | 1 | 3 |
| 2005 | 0 | 2 |
| 2006 | 3 | 3 |
| 2007 | 4 | 4 |
| 2008 | 3 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 5 |
| 2011 | 0 | 1 |
| 2012 | 5 | 4 |
| 2013 | 1 | 1 |
| 2014 | 2 | 6 |
| 2015 | 1 | 3 |
| 2016 | 3 | 6 |
| 2017 | 4 | 5 |
| 2018 | 5 | 3 |
| 2019 | 2 | 4 |
| 2020 | 3 | 5 |
| 2021 | 2 | 1 |
| 2022 | 3 | 3 |
| 2023 | 1 | 1 |
| 2024 | 1 | 4 |
| 2025 | 4 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Pumpless top-up water heating tank23 Jan 2025US 2025/0027679 A1Mixergy Limited
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Most cited
By later US patents
- Electric water heater90US 6,080,973 ASherwood-Templeton Coal Company, Inc. · 2000
- Electronic temperature controller for water heaters89US 5,442,157 AWater Heater Innovations, Inc. · 1995
- Electrtic, modular tankless fluids heater81US 5,325,822 A1994
- Water heater and method of controlling the same38US 7,346,274 B22008
- Electric instantaneous water heater with enhanced temperature control37US 4,786,782 AMatsushita Electric Industrial Co., Ltd. · 1988