F24H 1/103
With bare resistances in direct contact with the fluid
Official title: {with bare resistances in direct contact with the fluid}
F24H1/103 (With bare resistances in direct contact with the fluid) appears on 79 US grants and 106 published applications in this corpus.
Search patents in F24H- Granted patents
- 79
- Published applications
- 106
- Assignees
- 63
- Inventors
- 185
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 4 |
| 2010 | 0 | 1 |
| 2011 | 1 | 3 |
| 2012 | 2 | 3 |
| 2013 | 1 | 4 |
| 2014 | 2 | 4 |
| 2015 | 5 | 8 |
| 2016 | 3 | 4 |
| 2017 | 6 | 6 |
| 2018 | 4 | 14 |
| 2019 | 4 | 11 |
| 2020 | 11 | 16 |
| 2021 | 4 | 7 |
| 2022 | 4 | 6 |
| 2023 | 5 | 1 |
| 2024 | 6 | 3 |
| 2025 | 2 | 8 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heater bundles having variable power output within zones22 Sep 2026US 12,742,570 B2Watlao Electric Manufacturing Company
- Heating element with open-cell structure4 Aug 2026US 12,701,640 B2Kanthal AB
- Heater bundles having virtual sensing for thermal gradient compensation24 Feb 2026US 12,560,356 B2Watlow Electric Manufacturing Company
- Heater bundles with local power switching3 Feb 2026US 12,540,757 B2Watlow Electric Manufacturing Company
- Direct-heating type heater27 May 2025US 12,313,295 B2Shanghai Kohler Electronics, Ltd.
- Smart electric heater for bathing installations8 Oct 2026US 2026/0309370 A1Balboa Water Group, Inc.
- Heating device30 Jul 2026US 2026/0218941 A1Valeo Systemes Thermiques
- Heating element with open-cell structure11 Dec 2025US 2025/0380340 A1Kanthal AB
- Heating element and fluid heater and method for heating a fluid21 Aug 2025US 2025/0267770 A1Kanthal AB
- Direct-Heating Type Heater10 Jul 2025US 2025/0224140 A1Shanghai Kohler Electronics, Ltd.
Most cited
By later US patents
- Flexible gas hose assembly with concentric helical tube members having reinforcement spring coils105US 5,600,752 AIndustrial Design Laboratories Inc. · 1997
- Electrical resistance fluid heating apparatus57US 4,762,980 AThermar Corporation · 1988
- In line tankless water heater with upper heating compartment, lower wiring compartment, and microswitch compartment disposed therebetween45US 5,437,003 AHot Aqua Industries, Inc. · 1995
- Throughflow electric heater for fluids such as air42US 4,233,494 ALinde Aktiengesellschaft · 1980
- Electric tankless water heater34US 6,909,843 B1Eemax, Inc. · 2005