F28F 19/004
Preventing the formation of deposits or corrosion: by using protective electric currents
Official title: {by using protective electric currents, voltages, cathodes, anodes, electric short-circuits}
F28F19/004 (Preventing the formation of deposits or corrosion: by using protective electric currents) appears on 71 US grants and 68 published applications in this corpus.
Search patents in F28F- Granted patents
- 71
- Published applications
- 68
- Assignees
- 58
- Inventors
- 222
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 1 |
| 2002 | 2 | 5 |
| 2003 | 2 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 2 | 4 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 0 | 6 |
| 2016 | 0 | 2 |
| 2017 | 2 | 3 |
| 2018 | 3 | 2 |
| 2019 | 2 | 8 |
| 2020 | 5 | 1 |
| 2021 | 2 | 5 |
| 2022 | 4 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 8 |
| 2025 | 3 | 6 |
| 2026 | 4 | 2 |
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 transfer system51US 5,802,864 APeregrine Industries, Inc. · 1998
- Heat transfer system39US 6,253,564 B1Peregrine Industries, Inc. · 2001
- Housingless oil cooler27US 5,099,912 ACalsonic Corporation · 1992
- Plate-type heat exchanger and method of producing the same26US 5,429,183 AMitsubishi Denki Kabushiki Kaisha · 1995
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