F28D 7/00
Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the
Official title: Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
F28D7/00 (Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the) appears on 4,707 US grants and 5,195 published applications in this corpus.
Search patents in F28D- Granted patents
- 4,707
- Published applications
- 5,195
- Assignees
- 2,385
- Inventors
- 10,678
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 30 | 0 |
| 1977 | 37 | 0 |
| 1978 | 36 | 0 |
| 1979 | 36 | 0 |
| 1980 | 60 | 0 |
| 1981 | 64 | 0 |
| 1982 | 61 | 0 |
| 1983 | 47 | 0 |
| 1984 | 58 | 0 |
| 1985 | 52 | 0 |
| 1986 | 49 | 0 |
| 1987 | 56 | 0 |
| 1988 | 46 | 0 |
| 1989 | 54 | 0 |
| 1990 | 52 | 0 |
| 1991 | 48 | 0 |
| 1992 | 41 | 0 |
| 1993 | 42 | 0 |
| 1994 | 46 | 0 |
| 1995 | 42 | 0 |
| 1996 | 38 | 0 |
| 1997 | 24 | 0 |
| 1998 | 58 | 0 |
| 1999 | 48 | 0 |
| 2000 | 61 | 0 |
| 2001 | 70 | 24 |
| 2002 | 56 | 78 |
| 2003 | 57 | 86 |
| 2004 | 75 | 108 |
| 2005 | 66 | 127 |
| 2006 | 78 | 138 |
| 2007 | 79 | 155 |
| 2008 | 69 | 190 |
| 2009 | 71 | 157 |
| 2010 | 89 | 213 |
| 2011 | 101 | 225 |
| 2012 | 100 | 209 |
| 2013 | 106 | 227 |
| 2014 | 119 | 260 |
| 2015 | 145 | 284 |
| 2016 | 141 | 265 |
| 2017 | 222 | 312 |
| 2018 | 231 | 284 |
| 2019 | 264 | 309 |
| 2020 | 230 | 258 |
| 2021 | 245 | 270 |
| 2022 | 214 | 257 |
| 2023 | 210 | 235 |
| 2024 | 185 | 218 |
| 2025 | 206 | 189 |
| 2026 | 92 | 117 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F28D 7/16The conduits being arranged in parallel spaced relation1,674
- F28D 7/10The conduits being arranged one within the other1,150
- F28D 7/02The conduits being helically coiled808
- F28D 7/0066Multi-circuit heat-exchangers541
- F28D 7/08The conduits being otherwise bent485
- F28D 7/0008The conduits for one medium being in heat conductive contact with the389
- F28D 7/06The conduits having a single u-bend365
- F28D 7/0041The conduits for only one medium being tubes having parts touching each144
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Most cited
By later US patents
- Method and apparatus for in situ gasification of coal and the commercial products derived therefrom276US 3,952,802 AIn Situ Technology, Inc. · 1976
- Motor vehicle windshield washer system240US 5,183,099 ACaoutchouc Manufacture et Plastiques · 1993
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- Portable I.V. fluid warming system171US 6,142,974 AEstill Medical Technologies, Inc. · 2000