F28G 3/163
From internal surfaces of heat exchange conduits
Official title: {from internal surfaces of heat exchange conduits}
F28G3/163 (From internal surfaces of heat exchange conduits) appears on 47 US grants and 55 published applications in this corpus.
Search patents in F28G- Granted patents
- 47
- Published applications
- 55
- Assignees
- 34
- Inventors
- 84
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 3 | 0 |
| 2012 | 1 | 5 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 2 | 4 |
| 2017 | 4 | 4 |
| 2018 | 3 | 7 |
| 2019 | 3 | 1 |
| 2020 | 4 | 4 |
| 2021 | 2 | 5 |
| 2022 | 4 | 3 |
| 2023 | 7 | 4 |
| 2024 | 3 | 3 |
| 2025 | 2 | 3 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-directional jet cleaning apparatus for steam generator7 Jul 2026US 12,674,634 B2Cgn Power Co., Ltd.
- High pressure nozzle3 Mar 2026US 12,564,855 B2P. Bekkers Holding B.V.
- Flexible lance drive apparatus with autostroke function23 Sep 2025US 12,422,203 B2Stoneage, Inc.
- Cleaning system and method1 Jul 2025US 12,345,484 B2Dos Viejos Amigos, LLC
- Tube bundle cleaning system and method24 Dec 2024US 12,173,973 B2USA DeBusk LLC
- Method of operating a lance cleaning machine using multiple modes20 Aug 2026US 2026/0243525 A1Stoneage, Inc.
- Method and apparatus for determining relative locations of tubes in a heat exchanger bundle20 Aug 2026US 2026/0243526 A1Stoneage, Inc.
- Method and apparatus for compensating for machine-mounting orientation20 Aug 2026US 2026/0243527 A1Stoneage, Inc.
- Method and apparatus for conserving movement in a bundle-cleaning assembly20 Aug 2026US 2026/0243528 A1Stoneage, Inc.
- Multi-Directional Jet Cleaning Apparatus for Steam Generator14 May 2026US 2026/0132998 A1Cgn Power Co., Ltd.
Most cited
By later US patents
- Automated heat exchanger tube cleaning assembly and system59US 8,308,869 B2Aquilex Hydrochem, Inc. · 2012
- Automated heat exchanger tube cleaning assembly and system36US 8,057,607 B2Aquilex Hydrochem, Inc. · 2011
- Method for cleaning the interior of tubes31US 4,225,362 A1980
- Apparatus for cleaning well tubular members24US 6,173,771 B1Schlumberger Technology Corporation · 2001
- Automated heat exchanger tube cleaning assembly and system23US 8,524,011 B2Aquilex Hydrochem, Inc. · 2013