F28F 11/00
Arrangements for sealing leaky tubes and conduits
Official title: Arrangements for sealing leaky tubes and conduits (stopping flow from or in pipes in general F16L55/10)
F28F11/00 (Arrangements for sealing leaky tubes and conduits) appears on 230 US grants and 102 published applications in this corpus.
Search patents in F28F- Granted patents
- 230
- Published applications
- 102
- Assignees
- 120
- Inventors
- 474
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 10 | 0 |
| 1987 | 10 | 0 |
| 1988 | 16 | 0 |
| 1989 | 16 | 0 |
| 1990 | 11 | 0 |
| 1991 | 7 | 0 |
| 1992 | 8 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 1 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 2 |
| 2003 | 3 | 2 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 5 |
| 2007 | 1 | 0 |
| 2008 | 1 | 2 |
| 2009 | 2 | 6 |
| 2010 | 1 | 4 |
| 2011 | 2 | 6 |
| 2012 | 0 | 2 |
| 2013 | 2 | 8 |
| 2014 | 6 | 5 |
| 2015 | 4 | 7 |
| 2016 | 4 | 4 |
| 2017 | 7 | 5 |
| 2018 | 4 | 10 |
| 2019 | 5 | 3 |
| 2020 | 4 | 7 |
| 2021 | 3 | 0 |
| 2022 | 3 | 6 |
| 2023 | 6 | 6 |
| 2024 | 6 | 4 |
| 2025 | 0 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat management apparatus and heat management system10 Feb 2026US 12,548,817 B2Zhejiang Sanhua Automotive Components Co., Ltd.
- Device and method for restoring the tube-to-tube sheet weld joints in a shell-and-tube equipment13 Jan 2026US 12,523,435 B2Alfa Laval Olmi S.P.A
- Expandable tapered pin plug for heat exchangers and air cooled heat exchangers31 Dec 2024US 12,181,095 B2JNT Technical Services, Inc.
- Device to repair leakage in high pressure shell-and-tubes heat exchanger using gasket and tensioning by cases31 Dec 2024US 12,181,228 B2Petroleo Brasileiro S.A. - Petrobras
- Tube transition5 Nov 2024US 12,135,177 B2Viking Vessel Holdings, LLC
- Connector device14 May 2026US 2026/0132996 A1Borgwarner Emissions Systems Spain, S.L.U.
- Heat exchanger, air conditioner arrangement and switch cabinet5 Mar 2026US 2026/0063372 A1Pfannenberg GmbH
- Sealing system and method10 Jul 2025US 2025/0224187 A1Erwin Quarder Systemtechnik GmbH
- Heat exchanger with leak detection system29 May 2025US 2025/0172345 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Expandable Tapered Pin Plug For Heat Exchangers and Air Cooled Heat Exchangers2 Jan 2025US 2025/0003543 A1JNT Technical Services, Inc.
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