F28F 1/003
Multiple wall conduits
Official title: {Multiple wall conduits, e.g. for leak detection (leak-detection in metal cooled nuclear reactor steam generators F22B1/066)}
F28F1/003 (Multiple wall conduits) appears on 137 US grants and 142 published applications in this corpus.
Search patents in F28F- Granted patents
- 137
- Published applications
- 142
- Assignees
- 131
- Inventors
- 335
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 2 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 2 | 4 |
| 2006 | 3 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 6 |
| 2009 | 1 | 4 |
| 2010 | 2 | 2 |
| 2011 | 0 | 6 |
| 2012 | 0 | 2 |
| 2013 | 0 | 11 |
| 2014 | 2 | 7 |
| 2015 | 3 | 8 |
| 2016 | 3 | 10 |
| 2017 | 8 | 10 |
| 2018 | 14 | 7 |
| 2019 | 9 | 8 |
| 2020 | 3 | 8 |
| 2021 | 7 | 14 |
| 2022 | 11 | 10 |
| 2023 | 9 | 4 |
| 2024 | 6 | 5 |
| 2025 | 4 | 3 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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