F28F 11/02
Arrangements for sealing leaky tubes and conduits: using obturating elements
Official title: using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence)
F28F11/02 (Arrangements for sealing leaky tubes and conduits: using obturating elements) appears on 152 US grants and 37 published applications in this corpus.
Search patents in F28F- Granted patents
- 152
- Published applications
- 37
- Assignees
- 58
- Inventors
- 246
- Latest grant
- 31 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 8 | 0 |
| 1987 | 9 | 0 |
| 1988 | 15 | 0 |
| 1989 | 14 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 2 |
| 2011 | 0 | 4 |
| 2012 | 0 | 2 |
| 2013 | 1 | 3 |
| 2014 | 4 | 2 |
| 2015 | 3 | 2 |
| 2016 | 3 | 1 |
| 2017 | 4 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 1 | 3 |
| 2023 | 2 | 3 |
| 2024 | 3 | 1 |
| 2025 | 0 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Method of securing a sleeve within a tube279US 4,069,573 ACombustion Engineering, Inc. · 1978
- Sleeving method134US 4,368,571 AWestinghouse Electric Corp. · 1983
- Method of repairing heat exchanger tube ends128US 4,941,512 ACTI Industries Corporation · 1990
- Annular tube-like driver127US 4,637,436 ARaychem Corporation · 1987
- Sleeve type repair of degraded nuclear steam generator tubes123US 4,592,577 AThe Babcock & Wilcox Company · 1986