F28G 1/163
From internal surfaces of heat exchange conduits
Official title: {from internal surfaces of heat exchange conduits}
F28G1/163 (From internal surfaces of heat exchange conduits) appears on 127 US grants and 126 published applications in this corpus.
Search patents in F28G- Granted patents
- 127
- Published applications
- 126
- Assignees
- 66
- Inventors
- 213
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 2 | 2 |
| 2005 | 0 | 0 |
| 2006 | 2 | 4 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 2 |
| 2010 | 2 | 3 |
| 2011 | 2 | 2 |
| 2012 | 1 | 4 |
| 2013 | 3 | 2 |
| 2014 | 2 | 3 |
| 2015 | 2 | 7 |
| 2016 | 3 | 7 |
| 2017 | 5 | 14 |
| 2018 | 10 | 9 |
| 2019 | 12 | 14 |
| 2020 | 5 | 14 |
| 2021 | 9 | 4 |
| 2022 | 15 | 9 |
| 2023 | 5 | 6 |
| 2024 | 7 | 6 |
| 2025 | 9 | 6 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Heat exchanger exchange-tube cleaning lance positioning system62US 6,681,839 B12004
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- Compact high pressure forward jetting spinning nozzle for cleaning44US 5,685,487 A1997
- Automated heat exchanger tube cleaning assembly and system36US 8,057,607 B2Aquilex Hydrochem, Inc. · 2011
- Multi-hose flexible lance tube cleaning system31US 5,022,463 AOhmstede Mechanical Services, Inc. · 1991