F24D 3/146
Tubes specially adapted for underfloor heating
Official title: {Tubes specially adapted for underfloor heating}
F24D3/146 (Tubes specially adapted for underfloor heating) appears on 31 US grants and 42 published applications in this corpus.
Search patents in F24D- Granted patents
- 31
- Published applications
- 42
- Assignees
- 24
- Inventors
- 64
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 2 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 5 |
| 2016 | 1 | 3 |
| 2017 | 0 | 2 |
| 2018 | 1 | 0 |
| 2019 | 3 | 3 |
| 2020 | 1 | 6 |
| 2021 | 4 | 2 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 1 | 2 |
| 2025 | 2 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Flexible hose heat exchanger construction with combination locating and thawing wire34US 5,022,459 A1991
- Method of forming a water heater tube29US 5,741,458 A1998
- Tube mat heat exchanger20US 4,270,596 ABio-Energy Systems, Inc. · 1981
- Apparatus and related methods of paving a subsurface20US 9,879,385 B22018
- Plastics pipe19US 8,470,423 B2Uponor Innovation AB Industrivagen · 2013