F24H 9/0021
Sleeves surrounding heating elements or heating pipes
Official title: {Sleeves surrounding heating elements or heating pipes, e.g. pipes filled with heat transfer fluid, for guiding heated liquid}
F24H9/0021 (Sleeves surrounding heating elements or heating pipes) appears on 76 US grants and 107 published applications in this corpus.
Search patents in F24H- Granted patents
- 76
- Published applications
- 107
- Assignees
- 71
- Inventors
- 197
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 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 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 3 | 4 |
| 2010 | 0 | 6 |
| 2011 | 1 | 1 |
| 2012 | 3 | 3 |
| 2013 | 1 | 4 |
| 2014 | 2 | 5 |
| 2015 | 1 | 7 |
| 2016 | 3 | 8 |
| 2017 | 3 | 4 |
| 2018 | 8 | 11 |
| 2019 | 4 | 6 |
| 2020 | 6 | 10 |
| 2021 | 6 | 4 |
| 2022 | 6 | 6 |
| 2023 | 2 | 6 |
| 2024 | 3 | 9 |
| 2025 | 5 | 9 |
| 2026 | 6 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stepped segmental baffle for electric process heater1 Sep 2026US 12,723,776 B2
- Heating element with open-cell structure4 Aug 2026US 12,701,640 B2Kanthal AB
- Hot water tank and flow through heating assembly23 Jun 2026US 12,663,181 B2National Machine Company
- Electric boiler5 May 2026US 12,618,589 B2
- Heating device, sanitary water supply device, and sanitary cleaning device24 Feb 2026US 12,559,925 B2Komoo Intelligent Technology Co., Ltd.
- Blade unit, heater module, and washer fluid supply apparatus including the same2 Apr 2026US 2026/0091762 A1SL Corporation
- Heating element with open-cell structure11 Dec 2025US 2025/0380340 A1Kanthal AB
- Ceramic heater and liquid heating device25 Sep 2025US 2025/0297772 A1Niterra Co., Ltd.
- Direct-Heating Type Heater10 Jul 2025US 2025/0224140 A1Shanghai Kohler Electronics, Ltd.
- Electric process heater with higher flux heating elements in zones of perpendicular flow27 Feb 2025US 2025/0067468 A1Thermon Canada Inc.
Most cited
By later US patents
- Water heating tank with thermosiphonic circulation for improved heat recovery rate32US 6,370,328 B12002
- Two-stage electric water heater28US 4,514,617 A1985
- Dialysis system27US 8,801,922 B2Home Dialysis Plus, Ltd. · 2014
- Dual compartment electric water heater15US 4,282,421 A1981
- Method of heating a body of liquid and a water heating unit for tanks utilizing such method14US 4,403,137 A1983