F28G 9/005
Cleaning by flushing or washing: of regenerative heat exchanger
Official title: {of regenerative heat exchanger}
F28G9/005 (Cleaning by flushing or washing: of regenerative heat exchanger) appears on 31 US grants and 19 published applications in this corpus.
Search patents in F28G- Granted patents
- 31
- Published applications
- 19
- Assignees
- 28
- Inventors
- 58
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 2 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 2 | 2 |
| 2018 | 0 | 3 |
| 2019 | 1 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 2 | 2 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- System and method for maintaining efficiency of a heat sink24 Jun 2025US 12,339,078 B2Fractal Heatsink Technologies LLC
- System and method for maintaining efficiency of a heat sink27 Feb 2024US 11,913,737 B2Fractal Heatsink Technologies LLC
- System and method for maintaining efficiency of a heat sink21 Mar 2023US 11,609,053 B2Fractal Heatsink Technologies LLC
- System and method for maintaining efficiency of a heat sink31 May 2022US 11,346,620 B2Fractal Heatsink Technologies LLC
- Deep cleaning alignment equipment26 Apr 2022US 11,313,632 B2Precision Iceblast Corporation
- Systems and methods for improving the boiling heat transfer of a heat transfer coil6 Mar 2025US 2025/0075336 A1Rheem Manufacturing Company
- System and method for maintaining efficiency of a heat sink25 Jul 2024US 2024/0247888 A1Fractal Heatsink Technologies LLC
- System and method for maintaining efficiency of a heat sink19 Oct 2023US 2023/0332851 A1Fractal Heatsink Technologies LLC
- Heat exchanger cleaning system and heat exchanger cleaning method3 Nov 2022US 2022/0349664 A1Geesco Co., Ltd.
- System and method for maintaining efficiency of a heat sink15 Sep 2022US 2022/0290933 A1Fractal Heatsink Technologies LLC
Most cited
By later US patents
- Apparatus and method for cleaning the heat exchanging surfaces of the heat transfer plates of a rotary regenerative heat exchanger26US 4,141,754 ASvenska Rotor Maskiner Aktiebolag · 1979
- Jet water cleaning apparatus21US 4,376,443 AJob-Master Sales, Inc. · 1983
- Air preheater cleaner17US 6,065,528 AABB Air Preheater, Inc. · 2000
- Apparatus for cleaning the heat exchanging surfaces of the heat transfer plates of rotary regenerative heat exchangers16US 4,025,362 ASvenska Rotor Maskiner Aktiebolag · 1977
- High energy wash of ljungstrom air preheater16US 4,256,511 AThe Dow Chemical Company · 1981