F28D 7/12
The surrounding tube being closed at one end
Official title: the surrounding tube being closed at one end, e.g. return type (F28D7/14 takes precedence)
F28D7/12 (The surrounding tube being closed at one end) appears on 225 US grants and 211 published applications in this corpus.
Search patents in F28D- Granted patents
- 225
- Published applications
- 211
- Assignees
- 210
- Inventors
- 546
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 7 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 3 |
| 2002 | 4 | 11 |
| 2003 | 1 | 0 |
| 2004 | 5 | 3 |
| 2005 | 0 | 3 |
| 2006 | 1 | 3 |
| 2007 | 2 | 7 |
| 2008 | 7 | 10 |
| 2009 | 2 | 4 |
| 2010 | 1 | 11 |
| 2011 | 1 | 8 |
| 2012 | 5 | 8 |
| 2013 | 5 | 9 |
| 2014 | 3 | 8 |
| 2015 | 3 | 14 |
| 2016 | 5 | 14 |
| 2017 | 8 | 11 |
| 2018 | 14 | 16 |
| 2019 | 11 | 15 |
| 2020 | 14 | 5 |
| 2021 | 12 | 10 |
| 2022 | 9 | 10 |
| 2023 | 6 | 9 |
| 2024 | 7 | 8 |
| 2025 | 10 | 6 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Fluid treatment apparatus and heat exchanger77US 4,671,351 AVerTech Treatment Systems, Inc. · 1987
- Cavity plate and jet nozzle assemblies for use in cooling an electronic module, and methods of fabrication thereof77US 6,431,260 B1International Business Machines Corporation · 2002
- End caps for reflux fluid heated patient line58US 5,097,898 ALevel 1 Technologies, Inc. · 1992
- Cryogenic heat exchanger57US 5,901,783 ACroyogen, Inc. · 1999
- Reflux fluid heated patient line52US 5,063,994 ALevel 1 Technologies, Inc. · 1991