F24H 9/455
For water heaters
Official title: {for water heaters}
F24H9/455 (For water heaters) appears on 81 US grants and 76 published applications in this corpus.
Search patents in F24H- Granted patents
- 81
- Published applications
- 76
- Assignees
- 40
- Inventors
- 152
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 2 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 4 |
| 2009 | 1 | 5 |
| 2010 | 1 | 1 |
| 2011 | 3 | 4 |
| 2012 | 1 | 2 |
| 2013 | 1 | 4 |
| 2014 | 4 | 9 |
| 2015 | 1 | 1 |
| 2016 | 7 | 3 |
| 2017 | 4 | 1 |
| 2018 | 2 | 4 |
| 2019 | 3 | 6 |
| 2020 | 8 | 4 |
| 2021 | 2 | 7 |
| 2022 | 4 | 5 |
| 2023 | 2 | 4 |
| 2024 | 1 | 3 |
| 2025 | 5 | 0 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of chemically cleaning pipework systems12 May 2026US 12,624,459 B2
- Integrated anode for a heat exchanger17 Feb 2026US 12,553,644 B2Rheem Manufacturing Company
- Anode mounting head apparatus for heater treaters, tanks, vessels and other devices11 Nov 2025US 12,467,149 B1Gal Votec Alloys, Inc.
- Modular reversible water heater design26 Aug 2025US 12,398,924 B1
- Systems and devices for corrosion prevention and methods thereto3 Jun 2025US 12,319,597 B2Rheem Manufacturing Company
- Integrated Anode For A Heat Exchanger18 Jun 2026US 2026/0168701 A1Rheem Manufacturing Company
- Systems and methods for cathodic protection5 Mar 2026US 2026/0063331 A1
- Tank assembly for water heater and water heater1 Jan 2026US 2026/0002697 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- Magnesium rod assembly and water heater1 Jan 2026US 2026/0002702 A1Guangdong Midea Kitchen and Bath Appliances Mfg. Co., Ltd.
- Integrated Anode For A Heat Exchanger19 Dec 2024US 2024/0418408 A1Rheem Manufacturing Company
Most cited
By later US patents
- Electric water heater90US 6,080,973 ASherwood-Templeton Coal Company, Inc. · 2000
- Electric immersion heating unit with readily removable and replaceable galvanic current control resistor34US 4,848,616 ARheem Manufacturing Company · 1989
- Corrosion protection system for hot water tanks29US 4,407,711 ATexas Instruments Incorporated · 1983
- Passive water heater anode rod depletion sensor algorithm19US 8,890,703 B2General Electric Company · 2014
- Hot water heater corrosion detector probe18US 4,087,742 ACanadian Gas Research Institute · 1978