F28F 1/36
The means being helically wound fins or wire spirals
Official title: the means being helically wound fins or wire spirals
F28F1/36 (The means being helically wound fins or wire spirals) appears on 224 US grants and 220 published applications in this corpus.
Search patents in F28F- Granted patents
- 224
- Published applications
- 220
- Assignees
- 171
- Inventors
- 579
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 6 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 5 | 0 |
| 1998 | 9 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 6 |
| 2003 | 2 | 3 |
| 2004 | 4 | 5 |
| 2005 | 4 | 5 |
| 2006 | 3 | 7 |
| 2007 | 1 | 4 |
| 2008 | 4 | 8 |
| 2009 | 2 | 12 |
| 2010 | 4 | 10 |
| 2011 | 0 | 10 |
| 2012 | 4 | 12 |
| 2013 | 2 | 11 |
| 2014 | 3 | 15 |
| 2015 | 4 | 9 |
| 2016 | 5 | 11 |
| 2017 | 16 | 14 |
| 2018 | 8 | 11 |
| 2019 | 11 | 20 |
| 2020 | 11 | 7 |
| 2021 | 12 | 13 |
| 2022 | 6 | 10 |
| 2023 | 8 | 8 |
| 2024 | 3 | 4 |
| 2025 | 8 | 5 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Grey water heat recovery apparatus24 Feb 2026US 12,560,390 B2Consat AB
- Heat exchanger tubes and tube assembly configurations3 Feb 2026US 12,540,755 B2Rheem Manufacturing Company
- Fluid coolers, heat exchangers, seal assemblies and systems including fluid coolers or heat exchangers and related methods2 Dec 2025US 12,487,036 B2Flowserve Pte. Ltd.
- Cooling system for the liquid immersion cooling of electronic components18 Nov 2025US 12,477,689 B2Wieland-Werke AG
- Tube bundle heat exchanger1 Jul 2025US 12,345,476 B2Wieland-Werke AG
- Heat utilization system and heat generating device14 Aug 2025US 2025/0257908 A1Clean Planet Inc.
- Double pipe for heat exchange12 Jun 2025US 2025/0189233 A1Sumitomo Riko Company Limited
- Thermal capacity of elliptically finned heat exchanger22 May 2025US 2025/0164190 A1
- Polymeric tube-in-shell heat exchanger with twisted tubes22 May 2025US 2025/0164191 A1Trevi Systems Inc.
- Heat exchanger with helical baffles8 May 2025US 2025/0146767 A1
Most cited
By later US patents
- Heat transfer tubes and methods of fabrication thereof67US 5,697,430 AWolverine Tube, Inc. · 1997
- Integrated module for solid oxide fuel cell systems65US 6,749,958 B2Global Thermmelectric Inc. · 2004
- Method and apparatus for oxygenating and regulating the temperature of blood48US 4,138,288 AShiley Scientific, Inc. · 1979
- Stirling engine thermal system improvements47US 6,694,731 B2DEKA Products Limited Partnership · 2004
- Y and T-finned tubes and methods and apparatus for their making41US 4,168,618 AWieland-Werke AG · 1979