F24H 9/12
Arrangements for connecting heaters to circulation pipes
F24H9/12 (Arrangements for connecting heaters to circulation pipes) appears on 297 US grants and 338 published applications in this corpus.
Search patents in F24H- Granted patents
- 297
- Published applications
- 338
- Assignees
- 171
- Inventors
- 678
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 7 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 8 | 0 |
| 1991 | 7 | 0 |
| 1992 | 10 | 0 |
| 1993 | 2 | 0 |
| 1994 | 11 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 4 |
| 2003 | 6 | 3 |
| 2004 | 6 | 1 |
| 2005 | 3 | 2 |
| 2006 | 1 | 4 |
| 2007 | 6 | 7 |
| 2008 | 1 | 6 |
| 2009 | 2 | 10 |
| 2010 | 2 | 12 |
| 2011 | 3 | 12 |
| 2012 | 6 | 11 |
| 2013 | 5 | 14 |
| 2014 | 4 | 11 |
| 2015 | 9 | 15 |
| 2016 | 7 | 15 |
| 2017 | 8 | 18 |
| 2018 | 18 | 25 |
| 2019 | 22 | 23 |
| 2020 | 22 | 16 |
| 2021 | 13 | 19 |
| 2022 | 13 | 27 |
| 2023 | 13 | 7 |
| 2024 | 13 | 26 |
| 2025 | 16 | 20 |
| 2026 | 9 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hot water storage tank29 Sep 2026US 12,747,891 B2Mitsubishi Electric Corporation
- Tank water heater and water heating system8 Sep 2026US 12,729,879 B2A. O. Smith Corporation
- Air heating apparatus and method for disassembling air heating apparatus1 Sep 2026US 12,723,777 B2Kyungdong Navien Co., Ltd.
- Hot water tank and flow through heating assembly23 Jun 2026US 12,663,181 B2National Machine Company
- Flexible connectors for water heater23 Jun 2026US 12,663,182 B2A. O. Smith Corporation
- Air heating apparatus17 Sep 2026US 2026/0276241 A1Kyungdong Navien Co., Ltd.
- Electric hot water micro-tank preheater unit10 Sep 2026US 2026/0266476 A1
- Water heater system including upper pipes and lower pipes13 Aug 2026US 2026/0235324 A1Daesung Celtic Enersys Co., Ltd
- Water Heating System with Combination Valve30 Jul 2026US 2026/0218942 A1Rheem Manufacturing Company
- Systems and Methods for Attachment of Valve Assemblies in Water Heating Systems16 Jul 2026US 2026/0202093 A1Rheem Manufacturing Company
Most cited
By later US patents
- Supplemental electric water heater unit for compensating cooling of a hot water supply line49US 4,680,446 A1987
- Water heater heat trap assembly43US 4,286,573 AA. O. Smith Corporation · 1981
- Secondary circulation unit37US 4,917,142 A1990
- Non-metallic pressure vessel fitting34US 5,551,590 AAmtrol Inc. · 1996
- Electric continuous flow heater32US 4,584,463 AStiebel Eltron GmbH & Co. KG · 1986